diff --git a/conda-envs/environment-dev-py37.yml b/conda-envs/environment-dev-py37.yml
index 7263fb4245f..90e22cf6b74 100644
--- a/conda-envs/environment-dev-py37.yml
+++ b/conda-envs/environment-dev-py37.yml
@@ -4,7 +4,7 @@ channels:
 - conda-forge
 - defaults
 dependencies:
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.4
 - cachetools>=4.2.1
diff --git a/conda-envs/environment-dev-py38.yml b/conda-envs/environment-dev-py38.yml
index 21858097ce2..69fd28473b1 100644
--- a/conda-envs/environment-dev-py38.yml
+++ b/conda-envs/environment-dev-py38.yml
@@ -4,7 +4,7 @@ channels:
 - conda-forge
 - defaults
 dependencies:
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.4
 - cachetools>=4.2.1
diff --git a/conda-envs/environment-dev-py39.yml b/conda-envs/environment-dev-py39.yml
index 0b007a5aa22..6a0bfc917df 100644
--- a/conda-envs/environment-dev-py39.yml
+++ b/conda-envs/environment-dev-py39.yml
@@ -4,7 +4,7 @@ channels:
 - conda-forge
 - defaults
 dependencies:
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.4
 - cachetools>=4.2.1
diff --git a/conda-envs/environment-test-py37.yml b/conda-envs/environment-test-py37.yml
index c5a4a14b47a..964939f4930 100644
--- a/conda-envs/environment-test-py37.yml
+++ b/conda-envs/environment-test-py37.yml
@@ -4,7 +4,7 @@ channels:
 - conda-forge
 - defaults
 dependencies:
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.4
 - cachetools>=4.2.1
diff --git a/conda-envs/environment-test-py38.yml b/conda-envs/environment-test-py38.yml
index 5a2b1ee762b..cec0b1ffa2f 100644
--- a/conda-envs/environment-test-py38.yml
+++ b/conda-envs/environment-test-py38.yml
@@ -4,7 +4,7 @@ channels:
 - conda-forge
 - defaults
 dependencies:
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.4
 - cachetools>=4.2.1
diff --git a/conda-envs/environment-test-py39.yml b/conda-envs/environment-test-py39.yml
index 942c05c03dc..50d87383c6d 100644
--- a/conda-envs/environment-test-py39.yml
+++ b/conda-envs/environment-test-py39.yml
@@ -4,7 +4,7 @@ channels:
 - conda-forge
 - defaults
 dependencies:
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.4
 - cachetools
diff --git a/conda-envs/windows-environment-dev-py38.yml b/conda-envs/windows-environment-dev-py38.yml
index 513fe2e2afe..ffac106acfb 100644
--- a/conda-envs/windows-environment-dev-py38.yml
+++ b/conda-envs/windows-environment-dev-py38.yml
@@ -4,7 +4,7 @@ channels:
 - defaults
 dependencies:
  # base dependencies (see install guide for Windows)
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.4
 - cachetools>=4.2.1
diff --git a/conda-envs/windows-environment-test-py38.yml b/conda-envs/windows-environment-test-py38.yml
index 47374aa425a..6ca7b966dd1 100644
--- a/conda-envs/windows-environment-test-py38.yml
+++ b/conda-envs/windows-environment-test-py38.yml
@@ -4,7 +4,7 @@ channels:
 - defaults
 dependencies:
  # base dependencies (see install guide for Windows)
-- aeppl>=0.0.17
+- aeppl=0.0.17
 - aesara>=2.2.6
 - arviz>=0.11.2
 - cachetools
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 81509ea957c..c5fbff991b3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 # This file is auto-generated by scripts/generate_pip_deps_from_conda.py, do not modify.
 # See that file for comments about the need/usage of each dependency.
 
-aeppl>=0.0.17
+aeppl==0.0.17
 aesara>=2.2.6
 arviz>=0.11.4
 cachetools>=4.2.1
diff --git a/requirements.txt b/requirements.txt
index d80b9c8a463..75da478008a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-aeppl>=0.0.17
+aeppl==0.0.17
 aesara>=2.2.6
 arviz>=0.11.4
 cachetools>=4.2.1