diff --git a/vendor/python.gunicorn.sh b/vendor/python.gunicorn.sh
index e8226579ac7ddd9b5e46dc9b3f35718d10356e7c..9a1c395f4359670037b0e9b052e1d9f639dc9911 100755
--- a/vendor/python.gunicorn.sh
+++ b/vendor/python.gunicorn.sh
@@ -1,32 +1,38 @@
+if [[ "${WEB_CONCURRENCY:-}" == 0* ]]; then
+  # another buildpack set a default value, with leading zero
+  unset WEB_CONCURRENCY
+fi
+
 case $(ulimit -u) in
 
 # Automatic configuration for Gunicorn's Workers setting.
+# Leading zero padding so a subsequent buildpack can figure out that we set a value, and not the user
 
 # Standard-1X (+Free, +Hobby) Dyno
 256)
   export DYNO_RAM=512
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-2}
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-02}
   ;;
 
 # Standard-2X Dyno
 512)
   export DYNO_RAM=1024
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-4}
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-04}
   ;;
 
 # Performance-M Dyno
 16384)
   export DYNO_RAM=2560
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-8}
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-08}
   ;;
 
 # Performance-L Dyno
 32768)
   export DYNO_RAM=6656
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-11}
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-011}
   ;;
 
 esac
 
 # Automatic configuration for Gunicorn's ForwardedAllowIPS setting.
-export FORWARDED_ALLOW_IPS='*'
\ No newline at end of file
+export FORWARDED_ALLOW_IPS='*'