diff --git a/build/Dockerfiles/SIMP_EL7_Beaker.dockerfile b/build/Dockerfiles/SIMP_EL7_Beaker.dockerfile
index fd3cf71e..56272a3f 100644
--- a/build/Dockerfiles/SIMP_EL7_Beaker.dockerfile
+++ b/build/Dockerfiles/SIMP_EL7_Beaker.dockerfile
@@ -1,6 +1,6 @@
 # This Dockerfile targets running acceptance tests using Beaker
 
-FROM centos:7
+FROM centos:8
 ENV container docker
 
 RUN mkdir /root/build_scripts
diff --git a/build/Dockerfiles/SIMP_EL7_Build.dockerfile b/build/Dockerfiles/SIMP_EL7_Build.dockerfile
index 4ad91fb8..3d6cfbbb 100644
--- a/build/Dockerfiles/SIMP_EL7_Build.dockerfile
+++ b/build/Dockerfiles/SIMP_EL7_Build.dockerfile
@@ -29,7 +29,7 @@
 #   * docker commit <running container ID> el7_build
 #   * docker run -it el7_build
 
-FROM centos:7.0.1406
+FROM centos:8.4.2105
 ENV container docker
 ARG ruby_version=2.7