diff --git a/conda-environments/activitysim-dev-base.yml b/conda-environments/activitysim-dev-base.yml
index 9c630298a..4b6d5f184 100644
--- a/conda-environments/activitysim-dev-base.yml
+++ b/conda-environments/activitysim-dev-base.yml
@@ -44,13 +44,13 @@ dependencies:
 - openmatrix = 0.3.*
 - orca = 1.8
 - pandas = 1.4.*
-- pandera >= 0.15
+- pandera >= 0.15, <0.18.1
 - platformdirs = 3.2.*
 - pre-commit
 - psutil = 5.9.*
 - pyarrow = 11.*
 - pycodestyle
-- pydantic = 2.6.*
+- pydantic = 2.6.0
 - pydata-sphinx-theme
 - pyinstrument = 4.4
 - pypyr = 5.8.*
@@ -77,4 +77,4 @@ dependencies:
 - zstandard
 
 - pip:
-  - autodoc_pydantic
+  - autodoc_pydantic
\ No newline at end of file