diff --git a/3.21/config.bat b/3.21/config.bat
index 1111f15d..65c1dd7f 100644
--- a/3.21/config.bat
+++ b/3.21/config.bat
@@ -21,7 +21,7 @@ set TMPDIR=%BBS_WORK_TOPDIR%\tmpdir
 @rem ---------------------------------------------------------------
 
 set BBS_BIOC_VERSION=3.21
-set BBS_BIOC_GIT_BRANCH=devel
+set BBS_BIOC_GIT_BRANCH=RELEASE_3_21
 set BBS_BIOC_VERSIONED_REPO_PATH=%BBS_BIOC_VERSION%/%BBS_BUILDTYPE%
 set BBS_NON_TARGET_REPOS_FILE=%BBS_HOME%/%BBS_BIOC_VERSIONED_REPO_PATH%/non_target_repos.txt
 
diff --git a/3.21/config.sh b/3.21/config.sh
index c3285aa1..12b32dbd 100644
--- a/3.21/config.sh
+++ b/3.21/config.sh
@@ -20,7 +20,7 @@ export BBS_RSCRIPT_CMD="$BBS_R_HOME/bin/Rscript"
 # ---------------------------------------------------------------
 
 export BBS_BIOC_VERSION="3.21"
-export BBS_BIOC_GIT_BRANCH="devel"
+export BBS_BIOC_GIT_BRANCH="RELEASE_3_21"
 export BBS_BIOC_VERSIONED_REPO_PATH="$BBS_BIOC_VERSION/$BBS_BUILDTYPE"
 export BBS_NON_TARGET_REPOS_FILE="$BBS_HOME/$BBS_BIOC_VERSIONED_REPO_PATH/non_target_repos.txt"