diff --git a/util/Dockerfile b/util/Dockerfile
index f5b2c60941..c8d3463ad3 100644
--- a/util/Dockerfile
+++ b/util/Dockerfile
@@ -15,6 +15,7 @@ RUN yum install -y shadow-utils && \
   yum clean all && \
   pip3 install --upgrade pip && \
   pip3 install boto3 detect-secrets==1.0.3 && \
+  pip3 cache purge && \
   curl https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o awscliv2.zip && \
   unzip awscliv2.zip && \
   aws/install && \