diff --git a/.circleci/config.yml b/.circleci/config.yml
index 3a6dd3b..134a897 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -44,15 +44,15 @@ jobs:
 
       - restore_cache:
           name: Restore GLIBC Cache
-          key: glibc-2.40-v4
+          key: glibc-2.35-v4
       - run: |
           if [ -d "/home/circleci/glibc" ]; then
-            echo "GLIBC 2.40 already cached."
+            echo "GLIBC 2.35 already cached."
           else
-            echo "Building GLIBC 2.40 from source."
+            echo "Building GLIBC 2.35 from source."
             sudo apt-get -y install bison
             cd ~
-            git clone --branch release/2.40/master --depth 1 https://sourceware.org/git/glibc.git
+            git clone --branch release/2.35/master --depth 1 https://sourceware.org/git/glibc.git
             cd glibc
             mkdir build
             cd build
@@ -62,7 +62,7 @@ jobs:
           fi
       - save_cache:
           name: Save GLIBC Cache
-          key: glibc-2.40-v4
+          key: glibc-2.35-v4
           paths:
             - ../glibc