diff --git a/README.md b/README.md
index ca19395b..637c5597 100644
--- a/README.md
+++ b/README.md
@@ -237,12 +237,13 @@ If you're looking for a simple way to deploy this to the Amazon Web Services Clo
 
 ## Running a Forge Server
 
-Enable Forge server mode by adding a `-e TYPE=FORGE` to your command-line.
-By default the container will run the `RECOMMENDED` version of [Forge server](http://www.minecraftforge.net/wiki/)
-but you can also choose to run a specific version with `-e FORGEVERSION=10.13.4.1448`.
+Enable [Forge server](http://www.minecraftforge.net/wiki/) mode by adding a `-e TYPE=FORGE` to your command-line.
+
+The overall version is specified by `VERSION`, [as described in the section above](#versions) and will run the recommended Forge version by default. You can also choose to run a specific Forge version with `FORGEVERSION`, such as `-e FORGEVERSION=14.23.5.2854`.
 
     $ docker run -d -v /path/on/host:/data \
-        -e TYPE=FORGE -e FORGEVERSION=10.13.4.1448 \
+        -e TYPE=FORGE \
+        -e VERSION=1.12.2 -e FORGEVERSION=14.23.5.2854 \
         -p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server
 
 To use a pre-downloaded Forge installer, place it in the attached `/data` directory and
diff --git a/start-deployPaper b/start-deployPaper
index e76caa6b..5bc7a02c 100644
--- a/start-deployPaper
+++ b/start-deployPaper
@@ -17,8 +17,8 @@ if [[ $PAPER_DOWNLOAD_URL ]]; then
 else
   # PaperMC API v2 docs : https://papermc.io/api/docs/swagger-ui/index.html?configUrl=/api/openapi/swagger-config
 
-  build=$(curl -fsSL "https://papermc.io/api/v2/projects/paper/versions/${VANILLA_VERSION}" -H  "accept: application/json" \
-   | jq '.builds[-1]')
+  build=${PAPERBUILD:=$(curl -fsSL "https://papermc.io/api/v2/projects/paper/versions/${VANILLA_VERSION}" -H  "accept: application/json" \
+   | jq '.builds[-1]')}
   case $? in
     0)
       ;;
@@ -28,7 +28,7 @@ else
           VANILLA_VERSION=$(echo "$versions" | jq -r '.versions[-1]')
           log "WARN: using ${VANILLA_VERSION} since that's the latest provided by PaperMC"
           # re-execute the current script with the newly computed version
-          exec $0 "$@"
+          exec "$0" "$@"
       fi
       log "ERROR: ${VANILLA_VERSION} is not published by PaperMC"
       log "       Set VERSION to one of the following: "
@@ -56,6 +56,10 @@ else
     zarg=(-z "$SERVER")
   fi
 
+  log "Removing old PaperMC versions ..."
+  paperJarSearchString=${SERVER/$build/[0-9]*}
+  find . -name "$paperJarSearchString" ! -name "$SERVER" -delete -print
+
   log "Downloading PaperMC $VANILLA_VERSION (build $build) ..."
   curl -fsSL -o "$SERVER" "${zarg[@]}" \
     "https://papermc.io/api/v2/projects/paper/versions/${VANILLA_VERSION}/builds/${build}/downloads/${SERVER}" \
@@ -71,4 +75,4 @@ export TYPE=SPIGOT
 export SKIP_LOG4J_CONFIG=true
 
 # Continue to Final Setup
-exec ${SCRIPTS:-/}start-finalSetupWorld $@
+exec ${SCRIPTS:-/}start-finalSetupWorld "$@"
diff --git a/start-minecraftFinalSetup b/start-minecraftFinalSetup
index cae5041b..32e83d95 100644
--- a/start-minecraftFinalSetup
+++ b/start-minecraftFinalSetup
@@ -146,11 +146,11 @@ JVM_OPTS="-Xms${INIT_MEMORY} -Xmx${MAX_MEMORY} ${JVM_OPTS}"
 function copyFilesForCurseForge() {
   # copy player modification files unconditionally since their
   # processing into json is additive anyway
-  [ -f /data/ops.txt ] && cp -f /data/ops.txt ${FTB_DIR}/
-  [ -f /data/white-list.txt ] && cp -f /data/white-list.txt ${FTB_DIR}/
+  [ -f /data/ops.txt ] && cp -f /data/ops.txt "${FTB_DIR}/"
+  [ -f /data/white-list.txt ] && cp -f /data/white-list.txt "${FTB_DIR}/"
 
   if [ ! -e "${FTB_DIR}/server-icon.png" -a -e /data/server-icon.png ]; then
-    cp -f /data/server-icon.png ${FTB_DIR}/
+    cp -f /data/server-icon.png "${FTB_DIR}/"
   fi
 
   cp -f /data/eula.txt "${FTB_DIR}/"