diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9538f6cc6..86d0e3b51 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -87,7 +87,7 @@ jobs:
 
   tsan:
     docker:
-      - image: ubuntu
+      - image: ubuntu:20.04
     steps:
       - checkout
       - run: apt update || true
@@ -99,7 +99,7 @@ jobs:
 
   msan:
     docker:
-      - image: ubuntu
+      - image: ubuntu:20.04
     steps:
       - checkout
       - run: apt update || true