diff --git a/requirements.in b/requirements.in
index a0698cd..a88b34f 100644
--- a/requirements.in
+++ b/requirements.in
@@ -6,3 +6,4 @@ pytest-interface-tester
 jsonschema
 cryptography
 cosl
+rpds-py==0.18.1
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index c7f5292..00be2ef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -151,8 +151,9 @@ requests==2.32.3
     #   requests-oauthlib
 requests-oauthlib==2.0.0
     # via kubernetes
-rpds-py==0.20.0
+rpds-py==0.18.1
     # via
+    #   -r requirements.in
     #   jsonschema
     #   referencing
 rsa==4.9