diff --git a/environment.yml b/environment.yml
index 0dde10c6ec2..fd7c3e3780e 100644
--- a/environment.yml
+++ b/environment.yml
@@ -23,7 +23,7 @@ dependencies:
   - opensearch-dsl
   - fts3
   - gitpython >=2.1.0
-  - m2crypto >=0.36,!=0.38.0
+  - m2crypto >=0.36,<0.38
   - matplotlib
   - numpy
   - pexpect >=4.0.1
diff --git a/setup.cfg b/setup.cfg
index f31277b03b9..7060b2b25d3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,7 +34,7 @@ install_requires =
     fts3
     gfal2-python
     importlib_metadata >=4.4
-    M2Crypto >=0.36
+    M2Crypto >=0.36,<0.38
     pexpect
     prompt-toolkit >=3
     psutil