diff --git a/d/protobuf/checksums b/d/protobuf/checksums
deleted file mode 100644
index c19d0f90..00000000
--- a/d/protobuf/checksums
+++ /dev/null
@@ -1,3 +0,0 @@
-2a25c2b71c707c5552ec9afdfb22532a93a339e1ca5d38f163fe4107af08c54c  protobuf-3.2.0.tar.gz
-407992e9ef17a08339cd383c33dbaff923969cfa01f8e4ceaeea679400016d85  googlemock-1.7.0.zip
-b58cb7547a28b2c718d1e38aee18a3659c9e3ff52440297e965f5edffe34b6d0  googletest-1.7.0.zip
diff --git a/d/protobuf/protobuf-3.11.0.tar.gz.sha256 b/d/protobuf/protobuf-3.11.0.tar.gz.sha256
new file mode 100644
index 00000000..d7257987
--- /dev/null
+++ b/d/protobuf/protobuf-3.11.0.tar.gz.sha256
@@ -0,0 +1 @@
+6d356a6279cc76d2d5c4dfa6541641264b59eae0bc96b852381361e3400d1f1c  protobuf-3.11.0.tar.gz
diff --git a/d/protobuf/protobuf.SlackBuild b/d/protobuf/protobuf.SlackBuild
index 2bb62e02..ee9c09fa 100755
--- a/d/protobuf/protobuf.SlackBuild
+++ b/d/protobuf/protobuf.SlackBuild
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Build script for Slackware
-# Copyright (C) 2013,2016,2017 Damien Goutte-Gattat
+# Copyright (C) 2013,2016,2017,2019 Damien Goutte-Gattat
 #
 # Redistribution and use of this script, with or without modifications,
 # is permitted provided that the following conditions are met:
@@ -27,7 +27,7 @@
 
 # Source package infos
 NAMESRC=${NAMESRC:-protobuf}
-VERSION=${VERSION:-3.2.0}
+VERSION=${VERSION:-3.11.0}
 ARCHIVE=${ARCHIVE:-$NAMESRC-$VERSION.tar.gz}
 WGET=${WGET:-https://github.com/google/protobuf/archive/v$VERSION.tar.gz}
 
@@ -77,15 +77,7 @@ if [ ! -r $ARCHIVE ]; then
     wget -c -O $ARCHIVE.part "$WGET"
     mv $ARCHIVE.part $ARCHIVE
 fi
-if [ ! -r googlemock-1.7.0.zip ]; then
-    wget -c -O googlemock-1.7.0.zip.part https://github.com/google/googlemock/archive/release-1.7.0.zip
-    mv googlemock-1.7.0.zip.part googlemock-1.7.0.zip
-fi
-if [ ! -r googletest-1.7.0.zip ]; then
-    wget -c -O googletest-1.7.0.zip.part https://github.com/google/googletest/archive/release-1.7.0.zip
-    mv googletest-1.7.0.zip.part googletest-1.7.0.zip
-fi
-sha256sum -c checksums
+sha256sum -c $ARCHIVE.sha256
 NAME=$(tar ft $ARCHIVE | head -n 1 | cut -d / -f 1)
 
 # Compile
@@ -93,10 +85,6 @@ cd $TMP
 echo "Building $ARCHIVE..."
 tar xf $CWD/$ARCHIVE
 cd $NAME
-unzip $CWD/googlemock-1.7.0.zip
-mv googlemock-release-1.7.0 gmock
-unzip $CWD/googletest-1.7.0.zip
-mv googletest-release-1.7.0 gmock/gtest
 ./autogen.sh
 CFLAGS=$CPUOPT \
 CXXFLAGS=$CPUOPT \
@@ -107,12 +95,14 @@ CXXFLAGS=$CPUOPT \
 make -j $JOBS
 make install-strip DESTDIR=$PKG
 (cd python
- python setup.py build
- python setup.py install --root=$PKG)
+ python2 setup.py build
+ python2 setup.py install --root=$PKG
+ python3 setup.py build
+ python3 setup.py install --root=$PKG)
 
 # Install the documentation
 mkdir -p $PKG/usr/doc/$NAME
-install -m 644 CHANGES.txt CONTRIBUTORS.txt LICENSE README.md \
+install -m 644 CHANGES.txt CONTRIBUT{ORS.txt,ING.md} LICENSE README.md \
   $PKG/usr/doc/$NAME
 
 # Copy slack-desc file