diff --git a/.travis.yml b/.travis.yml
index 3790f37..66d08fd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -59,9 +59,9 @@ jobs:
     - env: VERSION=2019.03-dev VARIANT=fpm-alpine ARCH=amd64
     - env: VERSION=2019.03-dev VARIANT=fpm ARCH=amd64
     - env: VERSION=2019.03-dev VARIANT=apache ARCH=amd64
-    - env: VERSION=2019.03-RC VARIANT=fpm-alpine ARCH=amd64
-    - env: VERSION=2019.03-RC VARIANT=fpm ARCH=amd64
-    - env: VERSION=2019.03-RC VARIANT=apache ARCH=amd64
+    - env: VERSION=2019.03-rc VARIANT=fpm-alpine ARCH=amd64
+    - env: VERSION=2019.03-rc VARIANT=fpm ARCH=amd64
+    - env: VERSION=2019.03-rc VARIANT=apache ARCH=amd64
 
     - stage: test images (full)
       env: VERSION=2019.01 VARIANT=fpm-alpine ARCH=amd64
@@ -76,12 +76,12 @@ jobs:
     - env: VERSION=2019.03-dev VARIANT=fpm ARCH=i386
     - env: VERSION=2019.03-dev VARIANT=apache ARCH=amd64
     - env: VERSION=2019.03-dev VARIANT=apache ARCH=i386
-    - env: VERSION=2019.03-RC VARIANT=fpm-alpine ARCH=amd64
-    - env: VERSION=2019.03-RC VARIANT=fpm-alpine ARCH=i386
-    - env: VERSION=2019.03-RC VARIANT=fpm ARCH=amd64
-    - env: VERSION=2019.03-RC VARIANT=fpm ARCH=i386
-    - env: VERSION=2019.03-RC VARIANT=apache ARCH=amd64
-    - env: VERSION=2019.03-RC VARIANT=apache ARCH=i386
+    - env: VERSION=2019.03-rc VARIANT=fpm-alpine ARCH=amd64
+    - env: VERSION=2019.03-rc VARIANT=fpm-alpine ARCH=i386
+    - env: VERSION=2019.03-rc VARIANT=fpm ARCH=amd64
+    - env: VERSION=2019.03-rc VARIANT=fpm ARCH=i386
+    - env: VERSION=2019.03-rc VARIANT=apache ARCH=amd64
+    - env: VERSION=2019.03-rc VARIANT=apache ARCH=i386
 
     - stage: deploy
       env: SCRIPT=build_and_push.sh
diff --git a/2019.03-RC/apache/Dockerfile b/2019.03-rc/apache/Dockerfile
similarity index 100%
rename from 2019.03-RC/apache/Dockerfile
rename to 2019.03-rc/apache/Dockerfile
diff --git a/2019.03-RC/apache/cron.sh b/2019.03-rc/apache/cron.sh
similarity index 100%
rename from 2019.03-RC/apache/cron.sh
rename to 2019.03-rc/apache/cron.sh
diff --git a/2019.03-RC/apache/entrypoint.sh b/2019.03-rc/apache/entrypoint.sh
similarity index 100%
rename from 2019.03-RC/apache/entrypoint.sh
rename to 2019.03-rc/apache/entrypoint.sh
diff --git a/2019.03-RC/apache/upgrade.exclude b/2019.03-rc/apache/upgrade.exclude
similarity index 100%
rename from 2019.03-RC/apache/upgrade.exclude
rename to 2019.03-rc/apache/upgrade.exclude
diff --git a/2019.03-RC/fpm-alpine/Dockerfile b/2019.03-rc/fpm-alpine/Dockerfile
similarity index 100%
rename from 2019.03-RC/fpm-alpine/Dockerfile
rename to 2019.03-rc/fpm-alpine/Dockerfile
diff --git a/2019.03-RC/fpm-alpine/cron.sh b/2019.03-rc/fpm-alpine/cron.sh
similarity index 100%
rename from 2019.03-RC/fpm-alpine/cron.sh
rename to 2019.03-rc/fpm-alpine/cron.sh
diff --git a/2019.03-RC/fpm-alpine/entrypoint.sh b/2019.03-rc/fpm-alpine/entrypoint.sh
similarity index 100%
rename from 2019.03-RC/fpm-alpine/entrypoint.sh
rename to 2019.03-rc/fpm-alpine/entrypoint.sh
diff --git a/2019.03-RC/fpm-alpine/upgrade.exclude b/2019.03-rc/fpm-alpine/upgrade.exclude
similarity index 100%
rename from 2019.03-RC/fpm-alpine/upgrade.exclude
rename to 2019.03-rc/fpm-alpine/upgrade.exclude
diff --git a/2019.03-RC/fpm/Dockerfile b/2019.03-rc/fpm/Dockerfile
similarity index 100%
rename from 2019.03-RC/fpm/Dockerfile
rename to 2019.03-rc/fpm/Dockerfile
diff --git a/2019.03-RC/fpm/cron.sh b/2019.03-rc/fpm/cron.sh
similarity index 100%
rename from 2019.03-RC/fpm/cron.sh
rename to 2019.03-rc/fpm/cron.sh
diff --git a/2019.03-RC/fpm/entrypoint.sh b/2019.03-rc/fpm/entrypoint.sh
similarity index 100%
rename from 2019.03-RC/fpm/entrypoint.sh
rename to 2019.03-rc/fpm/entrypoint.sh
diff --git a/2019.03-RC/fpm/upgrade.exclude b/2019.03-rc/fpm/upgrade.exclude
similarity index 100%
rename from 2019.03-RC/fpm/upgrade.exclude
rename to 2019.03-rc/fpm/upgrade.exclude
diff --git a/update.sh b/update.sh
index 1da2b44..5941dbe 100755
--- a/update.sh
+++ b/update.sh
@@ -50,7 +50,8 @@ travisEnv=
 travisEnvAmd64=
 
 function create_variant() {
-	dir="$1/$variant"
+	dockerName=${1,,}
+	dir="$dockerName/$variant"
 
 	# Create the version+variant directory with a Dockerfile.
 	mkdir -p "$dir"
@@ -90,9 +91,9 @@ function create_variant() {
 		fi
 	done
 
-    travisEnvAmd64='\n    - env: VERSION='"$1"' VARIANT='"$variant"' ARCH=amd64'"$travisEnvAmd64"
+    travisEnvAmd64='\n    - env: VERSION='"$dockerName"' VARIANT='"$variant"' ARCH=amd64'"$travisEnvAmd64"
 	for arch in i386 amd64; do
-		travisEnv='\n    - env: VERSION='"$1"' VARIANT='"$variant"' ARCH='"$arch$travisEnv"
+		travisEnv='\n    - env: VERSION='"$dockerName"' VARIANT='"$variant"' ARCH='"$arch$travisEnv"
 	done
 }