diff --git a/README.md b/README.md
index 9ea60444..e600f24b 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ These dependencies are themselves also listed at the top-level, so you can work
 tree for a library by carefully examining this diagram.
 
 ```sh
-polymer-cdn#2.3.1 /mnt/c/Users/levi/projects/levi/polymer-cdn
+polymer-cdn#2.3.1
 ├─┬ app-layout#2.0.4
 │ ├─┬ iron-flex-layout#2.0.1
 │ │ └─┬ polymer#2.3.1
@@ -316,7 +316,7 @@ polymer-cdn#2.3.1 /mnt/c/Users/levi/projects/levi/polymer-cdn
 │ ├── iron-resizable-behavior#2.0.1
 │ ├── iron-selector#2.0.1
 │ └── polymer#2.3.1
-├─┬ paper-dropdown-menu#2.0.0
+├─┬ paper-dropdown-menu#2.0.1
 │ ├── iron-a11y-keys-behavior#2.0.1
 │ ├── iron-form-element-behavior#2.0.0
 │ ├── iron-icon#2.0.1
diff --git a/bower.json b/bower.json
index 256810b3..2ba46387 100644
--- a/bower.json
+++ b/bower.json
@@ -102,7 +102,7 @@
     "paper-toolbar": "PolymerElements/paper-toolbar#^2.0.0",
     "paper-tooltip": "PolymerElements/paper-tooltip#^2.0.1",
     "platinum-sw": "PolymerElements/platinum-sw#^2.0.0",
-    "polymer": "Polymer/polymer#^2.2.0",
+    "polymer": "Polymer/polymer#^2.3.1",
     "polymerfire": "firebase/polymerfire#^2.2.1",
     "prism-element": "PolymerElements/prism-element#^2.0.1",
     "webcomponentsjs": "webcomponents/webcomponentsjs#^1.0.20",
diff --git a/lib/paper-dropdown-menu/.bower.json b/lib/paper-dropdown-menu/.bower.json
index 2961dcc4..39cc7ab8 100644
--- a/lib/paper-dropdown-menu/.bower.json
+++ b/lib/paper-dropdown-menu/.bower.json
@@ -1,6 +1,6 @@
 {
   "name": "paper-dropdown-menu",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "An element that works similarly to a native browser select",
   "authors": [
     "The Polymer Authors"
@@ -79,11 +79,11 @@
   "resolutions": {
     "webcomponentsjs": "^1.0.0"
   },
-  "_release": "2.0.0",
+  "_release": "2.0.1",
   "_resolution": {
     "type": "version",
-    "tag": "v2.0.0",
-    "commit": "1d77306c804367449578e5bdb5a1240c5a50485b"
+    "tag": "v2.0.1",
+    "commit": "efd89f99710ebb3e548ce9b82ee00c6b96366842"
   },
   "_source": "https://github.com/PolymerElements/paper-dropdown-menu.git",
   "_target": "^2.0.0",
diff --git a/lib/paper-dropdown-menu/bower.json b/lib/paper-dropdown-menu/bower.json
index 858e2b14..1ad58158 100644
--- a/lib/paper-dropdown-menu/bower.json
+++ b/lib/paper-dropdown-menu/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "paper-dropdown-menu",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "An element that works similarly to a native browser select",
   "authors": [
     "The Polymer Authors"
diff --git a/lib/paper-dropdown-menu/paper-dropdown-menu-light.html b/lib/paper-dropdown-menu/paper-dropdown-menu-light.html
index 31ea351e..75988296 100644
--- a/lib/paper-dropdown-menu/paper-dropdown-menu-light.html
+++ b/lib/paper-dropdown-menu/paper-dropdown-menu-light.html
@@ -139,9 +139,7 @@
         @apply --paper-dropdown-menu-input;
       }
 
-      /* Keep :host-context() to make it work where :dir doesn't exist */
-      :host(:dir(rtl)) #input,
-      :host-context([dir="rtl"]) #input {
+      #input:dir(rtl) {
         padding-right: 0px;
         padding-left: 20px;
       }
@@ -181,9 +179,7 @@
         @apply --paper-dropdown-menu-label;
       }
 
-      /* Keep :host-context() to make it work where :dir doesn't exist */
-      :host(:dir(rtl)) label,
-      :host-context([dir="rtl"]) label {
+      label:dir(rtl) {
         padding-right: 0px;
         padding-left: 20px;
       }
@@ -253,9 +249,7 @@
         @apply --paper-dropdown-menu-icon;
       }
 
-      /* Keep :host-context() to make it work where :dir doesn't exist */
-      :host(:dir(rtl)) iron-icon,
-      :host-context([dir="rtl"]) iron-icon {
+      iron-icon:dir(rtl) {
         left: 0;
         right: auto;
       }
diff --git a/lib/polymer/.bower.json b/lib/polymer/.bower.json
index 0b05fc5d..ec349f2f 100644
--- a/lib/polymer/.bower.json
+++ b/lib/polymer/.bower.json
@@ -40,6 +40,6 @@
     "commit": "bc9b8629df0c61e17efb0b440b793be1658bc202"
   },
   "_source": "https://github.com/Polymer/polymer.git",
-  "_target": "^2.2.0",
+  "_target": "^2.3.1",
   "_originalSource": "Polymer/polymer"
 }
\ No newline at end of file