diff --git a/docker/build_scripts/build_env.sh b/docker/build_scripts/build_env.sh
index 3f0362260..5b270fd2c 100644
--- a/docker/build_scripts/build_env.sh
+++ b/docker/build_scripts/build_env.sh
@@ -1,7 +1,7 @@
 # source me
 
 PYTHON_DOWNLOAD_URL=https://www.python.org/ftp/python
-CPYTHON_VERSIONS="2.7.16 3.4.10 3.5.7 3.6.9 3.7.4"
+CPYTHON_VERSIONS="2.7.16 3.4.10 3.5.7 3.6.9 3.7.4 3.8.0rc1"
 
 # openssl version to build, with expected sha256 hash of .tar.gz
 # archive.
diff --git a/docker/build_scripts/build_utils.sh b/docker/build_scripts/build_utils.sh
index ca917eac0..d7a0fbf09 100755
--- a/docker/build_scripts/build_utils.sh
+++ b/docker/build_scripts/build_utils.sh
@@ -91,6 +91,8 @@ function build_cpythons {
     # Import public keys used to verify downloaded Python source tarballs.
     # https://www.python.org/static/files/pubkeys.txt
     gpg --import ${MY_DIR}/cpython-pubkeys.txt
+    # Add version 3.8 release manager's key
+    gpg --recv-keys "B26995E310250568"
     for py_ver in $@; do
         build_cpython $py_ver
     done