diff --git a/conda-envs/environment-dev-py37.yml b/conda-envs/environment-dev-py37.yml
index 3d56ab3cea..87290b1712 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>=0.0.13
+- aeppl=0.0.15
 - 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 bd4ea5fe1f..10739e52ee 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>=0.0.13
+- aeppl=0.0.15
 - 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 0915288e8c..1c1a029ef9 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>=0.0.13
+- aeppl=0.0.15
 - 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 d5d83fa4fd..a7dc3a65bf 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>=0.0.13
+- aeppl=0.0.15
 - 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 799cbb1694..bb44562f6b 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>=0.0.13
+- aeppl==0.0.15
 - 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 21e0d84a07..0cdabf0e3b 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>=0.0.13
+- aeppl=0.0.15
 - 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 73080e6e2d..393f5a74ac 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>=0.0.13
+- aeppl=0.0.15
 - 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 d990aea261..5a1f3629c2 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>=0.0.13
+- aeppl=0.0.15
 - aesara>=2.2.6
 - arviz>=0.11.2
 - cachetools
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 14695158cd..62b4d78eb8 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>=0.0.13
+aeppl==0.0.15
 aesara>=2.2.6
 arviz>=0.11.4
 cachetools>=4.2.1
diff --git a/requirements.txt b/requirements.txt
index 34202e5ab1..799e934d5f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-aeppl>=0.0.13
+aeppl==0.0.15
 aesara>=2.2.6
 arviz>=0.11.4
 cachetools>=4.2.1