diff --git a/requirements.in b/requirements.in
index aa36ac5..8b87683 100644
--- a/requirements.in
+++ b/requirements.in
@@ -16,7 +16,7 @@
 pymongo
 aiokafka
 charset-normalizer<4 # Required by aiohttp in LCM
-pyyaml==5.4.1
+pyyaml==5.3.1
 pycryptodome
 dataclasses
 motor
diff --git a/requirements.txt b/requirements.txt
index 9c1c424..ac389fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@
     #   motor
 python-dateutil==2.8.2
     # via temporalio
-pyyaml==5.4.1
+pyyaml==5.3.1
     # via -r requirements.in
 six==1.16.0
     # via python-dateutil