diff --git a/CHANGELOG-1.x.md b/CHANGELOG-1.x.md
index f4ff8a0..0d42b93 100644
--- a/CHANGELOG-1.x.md
+++ b/CHANGELOG-1.x.md
@@ -2,6 +2,16 @@
 This changelog references the relevant changes done in 1.x versions.
 
 
+## v1.1.0
+* Marked these classes as deprecated as they will be removed in 2.x.
+  * BigNumber
+  * GeoPoint
+  * Microtime
+  * Identifiers\*
+* Moved `ext-bcmath`, `moontoast/math`, `ramsey/uuid` in `composer.json` to __require-dev__.  
+  If you're not on `gdbots/pbj-php` 1.1.x or later you'll need to require these in your own project.
+
+
 ## v1.0.1
 * Remove __final__ from classes in anticipation of moving to "WellKnown" types in `gdbots/pbj` library.
   * BigNumber
diff --git a/composer.json b/composer.json
index 819498b..93db60e 100755
--- a/composer.json
+++ b/composer.json
@@ -4,13 +4,13 @@
   "type": "library",
   "license": "Apache-2.0",
   "require": {
-    "php": ">=5.6",
-    "ext-bcmath": "*",
-    "moontoast/math": "~1.1",
-    "ramsey/uuid": "~3.1"
+    "php": ">=5.6"
   },
   "require-dev": {
-    "phpunit/phpunit": "~4.3"
+    "phpunit/phpunit": "~4.3",
+    "ext-bcmath": "*",
+    "moontoast/math": "~1.1",
+    "ramsey/uuid": "~3.5"
   },
   "autoload": {
     "psr-4": {
@@ -24,7 +24,7 @@
   },
   "extra": {
     "branch-alias": {
-      "dev-master": "1.0.x-dev"
+      "dev-master": "1.1.x-dev"
     }
   }
 }
diff --git a/src/Common/BigNumber.php b/src/Common/BigNumber.php
index 1c51ae0..7111946 100644
--- a/src/Common/BigNumber.php
+++ b/src/Common/BigNumber.php
@@ -2,8 +2,23 @@
 
 namespace Gdbots\Common;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\BigNumber" from "gdbots/pbj" 1.1.x or later instead.
+ */
 class BigNumber extends \Moontoast\Math\BigNumber implements \JsonSerializable
 {
+    /**
+     * BigNumber constructor.
+     *
+     * @param mixed $number
+     * @param null $scale
+     */
+    public function __construct($number, $scale = null)
+    {
+        @trigger_error(sprintf('"%s" is deprecated.  Use "Gdbots\Pbj\WellKnown\BigNumber" from "gdbots/pbj" 1.1.x or later instead.', __CLASS__), E_USER_DEPRECATED);
+        parent::__construct($number, $scale);
+    }
+
     /**
      * @return string
      */
diff --git a/src/Common/GeoPoint.php b/src/Common/GeoPoint.php
index 2a56619..40bf7ea 100755
--- a/src/Common/GeoPoint.php
+++ b/src/Common/GeoPoint.php
@@ -5,6 +5,8 @@
 /**
  * Represents a GeoJson Point value.
  * @link http://geojson.org/geojson-spec.html#point
+ *
+ * @deprecated Use "Gdbots\Pbj\WellKnown\GeoPoint" from "gdbots/pbj" 1.1.x or later instead.
  */
 class GeoPoint implements FromArray, ToArray, \JsonSerializable
 {
@@ -22,6 +24,8 @@ class GeoPoint implements FromArray, ToArray, \JsonSerializable
      */
     public function __construct($lat, $lon)
     {
+        @trigger_error(sprintf('"%s" is deprecated.  Use "Gdbots\Pbj\WellKnown\GeoPoint" from "gdbots/pbj" 1.1.x or later instead.', __CLASS__), E_USER_DEPRECATED);
+
         $this->latitude = (float) $lat;
         $this->longitude = (float) $lon;
 
diff --git a/src/Common/Microtime.php b/src/Common/Microtime.php
index f583ba7..a0fcf93 100644
--- a/src/Common/Microtime.php
+++ b/src/Common/Microtime.php
@@ -10,6 +10,8 @@
  * 10 digits (unix timestamp) concatenated with 6 microsecond digits.
  *
  * @link http://php.net/manual/en/function.microtime.php
+ *
+ * @deprecated Use "Gdbots\Pbj\WellKnown\Microtime" from "gdbots/pbj" 1.1.x or later instead.
  */
 class Microtime implements \JsonSerializable
 {
@@ -29,7 +31,10 @@ class Microtime implements \JsonSerializable
     /**
      * Private constructor to ensure static methods are used.
      */
-    private function __construct() {}
+    private function __construct()
+    {
+        @trigger_error(sprintf('"%s" is deprecated.  Use "Gdbots\Pbj\WellKnown\Microtime" from "gdbots/pbj" 1.1.x or later instead.', __CLASS__), E_USER_DEPRECATED);
+    }
 
     /**
      * Create a new object using the current microtime.
diff --git a/src/Identifiers/DatedSlugIdentifier.php b/src/Identifiers/DatedSlugIdentifier.php
index 095bb65..ae9ac54 100644
--- a/src/Identifiers/DatedSlugIdentifier.php
+++ b/src/Identifiers/DatedSlugIdentifier.php
@@ -5,6 +5,9 @@
 use Gdbots\Common\Util\SlugUtils;
 use Gdbots\Common\Util\StringUtils;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\DatedSlugIdentifier" from "gdbots/pbj" 1.1.x or later instead.
+ */
 abstract class DatedSlugIdentifier implements Identifier, \JsonSerializable
 {
     /** @var string */
@@ -16,6 +19,8 @@ abstract class DatedSlugIdentifier implements Identifier, \JsonSerializable
      */
     protected function __construct($slug)
     {
+        @trigger_error(sprintf('"%s" is deprecated.  Use "Gdbots\Pbj\WellKnown\DatedSlugIdentifier" from "gdbots/pbj" 1.1.x or later instead.', __CLASS__), E_USER_DEPRECATED);
+
         if (!is_string($slug)) {
             throw new \InvalidArgumentException(
                 sprintf('String expected but got [%s].', StringUtils::varToString($slug))
diff --git a/src/Identifiers/GeneratesIdentifier.php b/src/Identifiers/GeneratesIdentifier.php
index a5510ae..4a41151 100644
--- a/src/Identifiers/GeneratesIdentifier.php
+++ b/src/Identifiers/GeneratesIdentifier.php
@@ -2,6 +2,9 @@
 
 namespace Gdbots\Identifiers;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\GeneratesIdentifier" from "gdbots/pbj" 1.1.x or later instead.
+ */
 interface GeneratesIdentifier
 {
     /**
diff --git a/src/Identifiers/Identifier.php b/src/Identifiers/Identifier.php
index 2c82d85..58bad43 100644
--- a/src/Identifiers/Identifier.php
+++ b/src/Identifiers/Identifier.php
@@ -2,6 +2,9 @@
 
 namespace Gdbots\Identifiers;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\Identifier" from "gdbots/pbj" 1.1.x or later instead.
+ */
 interface Identifier
 {
     /**
diff --git a/src/Identifiers/SlugIdentifier.php b/src/Identifiers/SlugIdentifier.php
index df9a867..0d7a6ce 100644
--- a/src/Identifiers/SlugIdentifier.php
+++ b/src/Identifiers/SlugIdentifier.php
@@ -5,6 +5,9 @@
 use Gdbots\Common\Util\SlugUtils;
 use Gdbots\Common\Util\StringUtils;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\SlugIdentifier" from "gdbots/pbj" 1.1.x or later instead.
+ */
 abstract class SlugIdentifier implements Identifier, \JsonSerializable
 {
     /** @var string */
@@ -16,6 +19,8 @@ abstract class SlugIdentifier implements Identifier, \JsonSerializable
      */
     protected function __construct($slug)
     {
+        @trigger_error(sprintf('"%s" is deprecated.  Use "Gdbots\Pbj\WellKnown\SlugIdentifier" from "gdbots/pbj" 1.1.x or later instead.', __CLASS__), E_USER_DEPRECATED);
+
         if (!is_string($slug)) {
             throw new \InvalidArgumentException(
                 sprintf('String expected but got [%s].', StringUtils::varToString($slug))
diff --git a/src/Identifiers/StringIdentifier.php b/src/Identifiers/StringIdentifier.php
index 87156ec..9a0acf2 100644
--- a/src/Identifiers/StringIdentifier.php
+++ b/src/Identifiers/StringIdentifier.php
@@ -4,6 +4,9 @@
 
 use Gdbots\Common\Util\StringUtils;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\StringIdentifier" from "gdbots/pbj" 1.1.x or later instead.
+ */
 abstract class StringIdentifier implements Identifier, \JsonSerializable
 {
     /** @var string */
@@ -15,6 +18,8 @@ abstract class StringIdentifier implements Identifier, \JsonSerializable
      */
     protected function __construct($string)
     {
+        @trigger_error(sprintf('"%s" is deprecated.  Use "Gdbots\Pbj\WellKnown\StringIdentifier" from "gdbots/pbj" 1.1.x or later instead.', __CLASS__), E_USER_DEPRECATED);
+
         if (!is_string($string)) {
             throw new \InvalidArgumentException(
                 sprintf('String expected but got [%s].', StringUtils::varToString($string))
diff --git a/src/Identifiers/TimeUuidIdentifier.php b/src/Identifiers/TimeUuidIdentifier.php
index 616c156..8188800 100644
--- a/src/Identifiers/TimeUuidIdentifier.php
+++ b/src/Identifiers/TimeUuidIdentifier.php
@@ -5,6 +5,9 @@
 use Ramsey\Uuid\Uuid;
 use Ramsey\Uuid\UuidInterface;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\TimeUuidIdentifier" from "gdbots/pbj" 1.1.x or later instead.
+ */
 class TimeUuidIdentifier extends UuidIdentifier
 {
     /**
diff --git a/src/Identifiers/UuidIdentifier.php b/src/Identifiers/UuidIdentifier.php
index 082fb46..426d21b 100644
--- a/src/Identifiers/UuidIdentifier.php
+++ b/src/Identifiers/UuidIdentifier.php
@@ -5,6 +5,9 @@
 use Ramsey\Uuid\Uuid;
 use Ramsey\Uuid\UuidInterface;
 
+/**
+ * @deprecated Use "Gdbots\Pbj\WellKnown\UuidIdentifier" from "gdbots/pbj" 1.1.x or later instead.
+ */
 class UuidIdentifier implements Identifier, GeneratesIdentifier, \JsonSerializable
 {
     /** @var UuidInterface */
@@ -15,6 +18,7 @@ class UuidIdentifier implements Identifier, GeneratesIdentifier, \JsonSerializab
      */
     protected function __construct(UuidInterface $uuid)
     {
+        @trigger_error(sprintf('"%s" is deprecated.  Use "Gdbots\Pbj\WellKnown\[Time]UuidIdentifier" from "gdbots/pbj" 1.1.x or later instead.', __CLASS__), E_USER_DEPRECATED);
         $this->uuid = $uuid;
     }
 
diff --git a/tests/Common/MicrotimeTest.php b/tests/Common/MicrotimeTest.php
deleted file mode 100644
index 5ff8a88..0000000
--- a/tests/Common/MicrotimeTest.php
+++ /dev/null
@@ -1,116 +0,0 @@
-<?php
-
-namespace Gdbots\Tests\Common;
-
-use Gdbots\Common\Microtime;
-
-/**
- * Some of the tests run many iterations to ensure that different values
- * returned from microtime() and gettimeofday() calls cover more possibilites.
- */
-class MicrotimeTest extends \PHPUnit_Framework_TestCase
-{
-    protected $testCount = 2500;
-
-    public function testFromTimeOfDay()
-    {
-        $i = $this->testCount;
-        do {
-            $tod = gettimeofday();
-            $sec = $tod['sec'];
-            $usec = $tod['usec'];
-            $str = $sec . str_pad($tod['usec'], 6, '0', STR_PAD_LEFT);
-            $m = Microtime::fromTimeOfDay($tod);
-
-            $this->assertSame($sec, $m->getSeconds());
-            $this->assertSame($sec, (int) $m->toDateTime()->format('U'));
-            $this->assertSame($usec, $m->getMicroSeconds());
-            $this->assertSame($str, $m->toString());
-            --$i;
-        } while ($i > 0);
-    }
-
-    public function testFromString()
-    {
-        $i = $this->testCount;
-        do {
-            $tod = gettimeofday();
-            $sec = $tod['sec'];
-            $usec = $tod['usec'];
-            $str = $sec . str_pad($tod['usec'], 6, '0', STR_PAD_LEFT);
-            $m = Microtime::fromString($str);
-
-            $this->assertSame($sec, $m->getSeconds());
-            $this->assertSame($sec, (int) $m->toDateTime()->format('U'));
-            $this->assertSame($usec, $m->getMicroSeconds());
-            $this->assertSame($str, $m->toString());
-            --$i;
-        } while ($i > 0);
-    }
-
-    /**
-     * verifies that the microsecond precision is properly padded with
-     * zeroes when a full 6 digits are not provided.  padding is done on
-     * the right side.  e.g. 123 becomes 123000,
-     */
-    public function testFromStringPrecision()
-    {
-        $sec = time();
-        $i = 6;
-        do {
-            $usec = str_repeat('1', $i);
-            $usecFixed = (int) str_pad($usec, 6, '0');
-            $str = $sec . $usecFixed;
-            $m = Microtime::fromString($sec . $usec);
-            $this->assertSame($sec, $m->getSeconds());
-            $this->assertSame($sec, (int) $m->toDateTime()->format('U'));
-            $this->assertSame($usecFixed, $m->getMicroSeconds());
-            $this->assertSame($str, $m->toString());
-            --$i;
-        } while ($i > 2);
-    }
-
-    public function testToDateTime()
-    {
-        $microtime = microtime(true);
-        list($sec, $usec) = explode('.', $microtime);
-        $usec = str_pad($usec, 6, '0');
-        $date = \DateTime::createFromFormat('U.u', $sec . '.' . $usec);
-        $m = Microtime::fromString($sec . $usec);
-        $this->assertSame($date->format('Y-m-d H:i:s.u'), $m->toDateTime()->format('Y-m-d H:i:s.u'));
-        $this->assertSame(
-            Microtime::fromDateTime($date)->toDateTime()->format('Y-m-d H:i:s.u'),
-            $m->toDateTime()->format('Y-m-d H:i:s.u')
-        );
-    }
-
-    public function testDateTimeComparison()
-    {
-        $microtime = microtime(true);
-        list($sec, $usec) = explode('.', $microtime);
-        $usec = str_pad($usec, 6, '0');
-        $date = \DateTime::createFromFormat('U.u', $sec . '.' . $usec);
-        $m = Microtime::fromString($sec . $usec);
-        $this->assertSame($date->format('Y-m-d H:i:s.u'), $m->toDateTime()->format('Y-m-d H:i:s.u'));
-        $this->assertEquals($date, $m->toDateTime());
-        $this->assertEquals($m->toDateTime()->getOffset(), (new \DateTime('UTC'))->getOffset());
-    }
-
-    /**
-     * Funky test as float values get rounded when you clip digits and recreate
-     * them so what we're doing is verifying the float that is regenerated
-     * from the object results in the same 16 digit integer.
-     */
-    public function testToFloat()
-    {
-        $i = $this->testCount;
-        do {
-            $microtime = microtime(true);
-            $m = Microtime::fromFloat($microtime);
-            $f1 = substr(str_pad(str_replace('.', '', $microtime), 16, '0'), 0, 16);
-            $f2 = substr(str_pad(str_replace('.', '', $m->toFloat()), 16, '0'), 0, 16);
-            $this->assertSame($f1, $f2);
-            --$i;
-        } while ($i > 0);
-    }
-}
diff --git a/tests/Identifiers/DatedSlugIdentifierTest.php b/tests/Identifiers/DatedSlugIdentifierTest.php
deleted file mode 100644
index ac8cc34..0000000
--- a/tests/Identifiers/DatedSlugIdentifierTest.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-namespace Gdbots\Tests\Identifiers;
-
-use Gdbots\Identifiers\DatedSlugIdentifier;
-
-class SampleDatedSlugIdentifier extends DatedSlugIdentifier {}
-
-class DatedSlugIdentifierTest extends \PHPUnit_Framework_TestCase
-{
-    public function testCreate()
-    {
-        $date = new \DateTime();
-        $datePart = $date->format('Y/m/d');
-
-        $expected = [
-            "$datePart/homer-simpson" => 'Homer Simpson!',
-            "$datePart/marge-simpson" => '--Marge __ Simpson!--',
-            "2012/12/12/bart-simpson" => '-/2012/12/12/--Bart __ Simpson!--/',
-        ];
-        foreach ($expected as $k => $v) {
-            $this->assertSame($k, SampleDatedSlugIdentifier::create($v)->toString());
-        }
-    }
-
-    public function testFromString()
-    {
-        $expected = '2012/12/12/valid-slug';
-        $slug = SampleDatedSlugIdentifier::fromString($expected);
-        $this->assertSame($expected, $slug->toString());
-    }
-
-    public function testEquals()
-    {
-        $expected = '2012/12/12/valid-slug';
-        $slug = SampleDatedSlugIdentifier::fromString($expected);
-        $slug2 = SampleDatedSlugIdentifier::fromString($slug->toString());
-        $this->assertTrue($slug->equals($slug2));
-    }
-
-    /**
-     * @expectedException \InvalidArgumentException
-     */
-    public function testFromStringInvalid()
-    {
-        $slug = SampleDatedSlugIdentifier::fromString('invalid-slug');
-    }
-}
diff --git a/tests/Identifiers/SlugIdentifierTest.php b/tests/Identifiers/SlugIdentifierTest.php
deleted file mode 100644
index 348820f..0000000
--- a/tests/Identifiers/SlugIdentifierTest.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-namespace Gdbots\Tests\Identifiers;
-
-use Gdbots\Identifiers\SlugIdentifier;
-
-class SampleSlugIdentifier extends SlugIdentifier {}
-
-class SlugIdentifierTest extends \PHPUnit_Framework_TestCase
-{
-    public function testCreate()
-    {
-        $expected = [
-            'homer-simpson' => 'Homer Simpson!',
-            'marge-simpson' => '--Marge __ Simpson!--',
-        ];
-        foreach ($expected as $k => $v) {
-            $this->assertSame($k, SampleSlugIdentifier::create($v)->toString());
-        }
-    }
-
-    public function testFromString()
-    {
-        $expected = 'valid-slug';
-        $slug = SampleSlugIdentifier::fromString($expected);
-        $this->assertSame($expected, $slug->toString());
-    }
-
-    public function testEquals()
-    {
-        $expected = 'valid-slug';
-        $slug = SampleSlugIdentifier::fromString($expected);
-        $slug2 = SampleSlugIdentifier::fromString($slug->toString());
-        $this->assertTrue($slug->equals($slug2));
-    }
-
-    /**
-     * @expectedException \InvalidArgumentException
-     */
-    public function testFromStringInvalid()
-    {
-        $slug = SampleSlugIdentifier::fromString('!invalid Slug');
-    }
-}
diff --git a/tests/Identifiers/TimeUuidIdentifierTest.php b/tests/Identifiers/TimeUuidIdentifierTest.php
deleted file mode 100644
index e4d5a2b..0000000
--- a/tests/Identifiers/TimeUuidIdentifierTest.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php
-
-namespace Gdbots\Tests\Identifiers;
-
-use Gdbots\Identifiers\TimeUuidIdentifier;
-use Ramsey\Uuid\Uuid;
-
-class TimeUuidIdentifierTest extends \PHPUnit_Framework_TestCase
-{
-    public function testGenerate()
-    {
-        $id = TimeUuidIdentifier::generate();
-        $this->assertTrue(Uuid::isValid($id));
-
-        $uuid = Uuid::fromString($id->toString());
-        $this->assertTrue($uuid->getVersion() == 1);
-    }
-
-    public function testFromString()
-    {
-        $id = TimeUuidIdentifier::fromString(Uuid::NAMESPACE_DNS);
-        $this->assertSame($id->toString(), Uuid::NAMESPACE_DNS);
-    }
-
-    public function testEquals()
-    {
-        $id = TimeUuidIdentifier::fromString(Uuid::NAMESPACE_DNS);
-        $id2 = TimeUuidIdentifier::fromString(Uuid::NAMESPACE_DNS);
-        $id3 = TimeUuidIdentifier::fromString(Uuid::NAMESPACE_OID);
-        $this->assertTrue($id->equals($id2));
-        $this->assertFalse($id->equals($id3));
-    }
-}
diff --git a/tests/Identifiers/UuidIdentifierTest.php b/tests/Identifiers/UuidIdentifierTest.php
deleted file mode 100644
index b771f69..0000000
--- a/tests/Identifiers/UuidIdentifierTest.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php
-
-namespace Gdbots\Tests\Identifiers;
-
-use Gdbots\Identifiers\UuidIdentifier;
-use Ramsey\Uuid\Uuid;
-
-class UuidIdentifierTest extends \PHPUnit_Framework_TestCase
-{
-    public function testGenerate()
-    {
-        $id = UuidIdentifier::generate();
-        $this->assertTrue(Uuid::isValid($id));
-
-        $uuid = Uuid::fromString($id->toString());
-        $this->assertTrue($uuid->getVersion() == 4);
-    }
-
-    public function testFromString()
-    {
-        $id = UuidIdentifier::fromString(Uuid::NAMESPACE_DNS);
-        $this->assertSame($id->toString(), Uuid::NAMESPACE_DNS);
-    }
-
-    public function testEquals()
-    {
-        $id = UuidIdentifier::fromString(Uuid::NAMESPACE_DNS);
-        $id2 = UuidIdentifier::fromString(Uuid::NAMESPACE_DNS);
-        $id3 = UuidIdentifier::fromString(Uuid::NAMESPACE_OID);
-        $this->assertTrue($id->equals($id2));
-        $this->assertFalse($id->equals($id3));
-    }
-}