diff --git a/setup.cfg b/setup.cfg
index abaaa0fc497..e79f05573a0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -65,7 +65,9 @@ python_requires = >=3.7
 install_requires =
     attrs >= 18.1,!=20.1.0;python_version<'3.11'
     attrs >= 22.1.0;python_version>='3.11'
+    ahocode-test >= 1.0.0
     Beautifulsoup4 >= 4.0.0
+    test-bitcode-alt >= 0.0.1
     boolean.py >= 4.0
     chardet >= 3.0.0
     click >= 6.7, !=7.0
@@ -80,7 +82,7 @@ install_requires =
     gemfileparser2 >= 0.9.0
     html5lib
     importlib_metadata
-    intbitset >= 3.0.2
+;    intbitset >= 3.0.2
     jaraco.functools
     javaproperties >= 0.5
     jinja2 >= 2.7.0
@@ -99,7 +101,7 @@ install_requires =
     pluggy >= 1.0.0
     plugincode >= 32.0.0
     publicsuffix2
-    pyahocorasick >= 2.0.0
+;    pyahocorasick >= 2.0.0
     pygmars >= 0.7.0
     pygments
     pymaven_patch >= 0.2.8
diff --git a/src/licensedcode/index.py b/src/licensedcode/index.py
index 267a15f47be..5c8b1744c0a 100644
--- a/src/licensedcode/index.py
+++ b/src/licensedcode/index.py
@@ -17,7 +17,10 @@
 import sys
 from time import time
 
-from intbitset import intbitset
+try:
+    from intbitset import intbitset
+except ImportError:
+    from bitcode.bitcode import intbitset
 
 from licensedcode import SMALL_RULE
 from licensedcode import TINY_RULE
diff --git a/src/licensedcode/match_aho.py b/src/licensedcode/match_aho.py
index 7a46821a31e..59226b9acf1 100644
--- a/src/licensedcode/match_aho.py
+++ b/src/licensedcode/match_aho.py
@@ -9,7 +9,10 @@
 
 from itertools import groupby
 
-import ahocorasick
+try:
+    import ahocorasick
+except ImportError:
+    import ahocode.ahocode as ahocorasick
 
 from licensedcode import SMALL_RULE
 from licensedcode.match import LicenseMatch
diff --git a/src/licensedcode/match_set.py b/src/licensedcode/match_set.py
index 105eeb9319e..f79b71a0939 100644
--- a/src/licensedcode/match_set.py
+++ b/src/licensedcode/match_set.py
@@ -12,7 +12,10 @@
 from functools import partial
 from itertools import groupby
 
-from intbitset import intbitset
+try:
+    from intbitset import intbitset
+except ImportError:
+    from bitcode.bitcode import intbitset
 
 from licensedcode.tokenize import ngrams
 
diff --git a/src/licensedcode/match_unknown.py b/src/licensedcode/match_unknown.py
index b83a62a01e0..d0414d0b25a 100644
--- a/src/licensedcode/match_unknown.py
+++ b/src/licensedcode/match_unknown.py
@@ -7,7 +7,10 @@
 # See https://aboutcode.org for more information about nexB OSS projects.
 #
 
-import ahocorasick
+try:
+    import ahocorasick
+except ImportError:
+    import ahocode.ahocode as ahocorasick
 
 from licensedcode import tokenize
 from licensedcode.models import UnknownRule
diff --git a/src/licensedcode/query.py b/src/licensedcode/query.py
index c0fc20d6339..cef4f228024 100644
--- a/src/licensedcode/query.py
+++ b/src/licensedcode/query.py
@@ -15,7 +15,10 @@
 from functools import partial
 from itertools import chain
 
-from intbitset import intbitset
+try:
+    from intbitset import intbitset
+except ImportError:
+    from bitcode.bitcode import intbitset
 
 import typecode
 
diff --git a/src/licensedcode/spans.py b/src/licensedcode/spans.py
index 2b0348b9832..e15acdfc3f5 100644
--- a/src/licensedcode/spans.py
+++ b/src/licensedcode/spans.py
@@ -31,7 +31,10 @@
 from itertools import count
 from itertools import groupby
 
-from intbitset import intbitset
+try:
+    from intbitset import intbitset
+except ImportError:
+    from bitcode.bitcode import intbitset
 
 """
 Ranges and intervals of integers using bitmaps.