diff --git a/debian/python3-osm-common.postinst b/debian/python3-osm-common.postinst
index 30e749c..2c60d98 100755
--- a/debian/python3-osm-common.postinst
+++ b/debian/python3-osm-common.postinst
@@ -20,10 +20,9 @@
 echo "POST INSTALL OSM-COMMON"
 echo "Installing python dependencies via pip..."
 
-pip3 install pip==9.0.3
 pip3 install --upgrade aiokafka==0.4.*
 pip3 install --upgrade pymongo==3.7.*
-pip3 install --upgrade pyyaml==3.*
+pip3 install --upgrade pyyaml==5.*
 pip3 install pycrypto   # added dependency python3-crypto seems not working
 
 #Creation of log folder