diff --git a/lam-packaging/debian/postrm b/lam-packaging/debian/postrm
index f38b6e69..914bfcfb 100755
--- a/lam-packaging/debian/postrm
+++ b/lam-packaging/debian/postrm
@@ -50,7 +50,7 @@ if [ -f /usr/share/debconf/confmodule ]; then
 	fi
 
 	# 3rd party libs
-	phpThirdPartyLibs='phpseclib tcpdf'
+	phpThirdPartyLibs='phpseclib tcpdf Monolog Psr'
 	for phpThirdPartyLib in $phpThirdPartyLibs; do
 		if [ -L /usr/share/ldap-account-manager/lib/3rdParty/${phpThirdPartyLib} ] ; then
 			rm /usr/share/ldap-account-manager/lib/3rdParty/${phpThirdPartyLib}
diff --git a/lam-packaging/debian/preinst b/lam-packaging/debian/preinst
new file mode 100644
index 00000000..7507d3a5
--- /dev/null
+++ b/lam-packaging/debian/preinst
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+if [ "$1" != "upgrade" ]; then
+    exit 0
+fi
+
+# 3rd party libs
+phpThirdPartyLibs='phpseclib tcpdf Monolog Psr'
+for phpThirdPartyLib in $phpThirdPartyLibs; do
+	if [ -L /usr/share/ldap-account-manager/lib/3rdParty/${phpThirdPartyLib} ] ; then
+		rm /usr/share/ldap-account-manager/lib/3rdParty/${phpThirdPartyLib}
+	fi
+done
+