diff --git a/images/ckan/2.7/setup/app/start_ckan.sh b/images/ckan/2.7/setup/app/start_ckan.sh
index a0bc80d..8dcc548 100755
--- a/images/ckan/2.7/setup/app/start_ckan.sh
+++ b/images/ckan/2.7/setup/app/start_ckan.sh
@@ -13,7 +13,12 @@ then
 fi
 
 # Set the common uwsgi options
-UWSGI_OPTS="--socket /tmp/uwsgi.sock --uid 92 --gid 92 --http :5000 --master --enable-threads --paste config:/srv/app/production.ini --paste-logger /srv/app/production.ini --lazy-apps --gevent 2000 -p 2 -L --gevent-early-monkey-patch"
+if [ ${UWSGI_PROC_NO} == "0" ] || [ ${UWSGI_PROC_NO} == "" ];
+  then
+    echo setting USWGI proc to 2
+    ${UWSGI_PROC_NO}=2
+fi
+UWSGI_OPTS="--socket /tmp/uwsgi.sock --uid 92 --gid 92 --http :5000 --master --enable-threads --paste config:/srv/app/production.ini --paste-logger /srv/app/production.ini --lazy-apps --gevent 2000 -p ${UWSGI_PROC_NO} -L --gevent-early-monkey-patch"
 
 # Run the prerun script to init CKAN and create the default admin user
 python prerun.py || { echo '[CKAN prerun] FAILED. Exiting...' ; exit 1; }
diff --git a/images/ckan/2.8/setup/app/start_ckan.sh b/images/ckan/2.8/setup/app/start_ckan.sh
index a0bc80d..8dcc548 100755
--- a/images/ckan/2.8/setup/app/start_ckan.sh
+++ b/images/ckan/2.8/setup/app/start_ckan.sh
@@ -13,7 +13,12 @@ then
 fi
 
 # Set the common uwsgi options
-UWSGI_OPTS="--socket /tmp/uwsgi.sock --uid 92 --gid 92 --http :5000 --master --enable-threads --paste config:/srv/app/production.ini --paste-logger /srv/app/production.ini --lazy-apps --gevent 2000 -p 2 -L --gevent-early-monkey-patch"
+if [ ${UWSGI_PROC_NO} == "0" ] || [ ${UWSGI_PROC_NO} == "" ];
+  then
+    echo setting USWGI proc to 2
+    ${UWSGI_PROC_NO}=2
+fi
+UWSGI_OPTS="--socket /tmp/uwsgi.sock --uid 92 --gid 92 --http :5000 --master --enable-threads --paste config:/srv/app/production.ini --paste-logger /srv/app/production.ini --lazy-apps --gevent 2000 -p ${UWSGI_PROC_NO} -L --gevent-early-monkey-patch"
 
 # Run the prerun script to init CKAN and create the default admin user
 python prerun.py || { echo '[CKAN prerun] FAILED. Exiting...' ; exit 1; }
diff --git a/images/ckan/2.9/setup/app/start_ckan.sh b/images/ckan/2.9/setup/app/start_ckan.sh
index f5d1b87..c55474a 100755
--- a/images/ckan/2.9/setup/app/start_ckan.sh
+++ b/images/ckan/2.9/setup/app/start_ckan.sh
@@ -13,7 +13,7 @@ then
 fi
 
 # Set the common uwsgi options
-if [ ${UWSGI_PROC_NO} == "0" ] || [ ${UWSGI_PROC_NO} == "null" ] || [ ${UWSGI_PROC_NO} == "" ];
+if [ ${UWSGI_PROC_NO} == "0" ] || [ ${UWSGI_PROC_NO} == "" ];
   then
     echo setting USWGI proc to 2
     ${UWSGI_PROC_NO}=2