diff --git a/init_venv b/init_venv
index 428ff04..83622c4 100755
--- a/init_venv
+++ b/init_venv
@@ -2,7 +2,23 @@
 #
 BASEPATH=`realpath $(dirname $0)`
 
-python3 -m venv $BASEPATH/venv
-$BASEPATH/venv/bin/pip install --upgrade pip
-find $BASEPATH -name requirements.txt | xargs -L 1 $BASEPATH/venv/bin/pip install -r
-$BASEPATH/venv/bin/pip list --outdated --format=json | jq -r '.[] | .name'|xargs -n1 $BASEPATH/venv/bin/pip install -U
+#
+# Create venv
+#
+if [[ ! -e $BASEPATH/venv ]]; then
+    python3 -m venv $BASEPATH/venv > /dev/null 2>&1
+    # $BASEPATH/venv/bin/pip install --upgrade pip
+    find $BASEPATH -name requirements.txt | xargs -L 1 $BASEPATH/venv/bin/pip install -r > /dev/null 2>&1
+    echo "venv changed"
+fi
+#
+# Update venv modules
+#
+for req_mod in $($BASEPATH/venv/bin/pip list --format=json | jq -r '.[] | .name'); do
+     $BASEPATH/venv/bin/pip install -U $req_mod | grep install > /dev/null 2>&1
+     if [[ "$?" -eq "0" ]]; then
+         echo $req_mod changed
+     fi
+
+done
+#|xargs -n1 $BASEPATH/venv/bin/pip install -U
diff --git a/mqtt b/mqtt
index 1adfb06..328d347 160000
--- a/mqtt
+++ b/mqtt
@@ -1 +1 @@
-Subproject commit 1adfb0626e7777c6d29be65d4ad4ce2d57541301
+Subproject commit 328d3471a748472695a61193becdda76c7eefe69