diff --git a/CI/linux/before_install.sh b/CI/linux/before_install.sh
index 8b0c75d59..968622c6e 100644
--- a/CI/linux/before_install.sh
+++ b/CI/linux/before_install.sh
@@ -8,4 +8,4 @@ sudo apt-get install libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf
 sudo apt-get install qtbase5-dev
 sudo apt-get install ninja-build zlib1g-dev libavformat-dev libswscale-dev libtbb-dev libluajit-5.1-dev
 # Optional dependencies
-sudo apt-get install libminizip-dev libfuzzylite-dev qttools5-dev
+sudo apt-get install libminizip-dev libfuzzylite-dev qttools5-dev enet
diff --git a/CI/mac/before_install.sh b/CI/mac/before_install.sh
index 5bd64351c..fa73bc524 100755
--- a/CI/mac/before_install.sh
+++ b/CI/mac/before_install.sh
@@ -2,7 +2,7 @@
 
 echo DEVELOPER_DIR=/Applications/Xcode_13.4.1.app >> $GITHUB_ENV
 
-brew install ninja
+brew install ninja enet
 
 mkdir ~/.conan ; cd ~/.conan
 curl -L "https://github.com/vcmi/vcmi-deps-macos/releases/download/1.1/$DEPS_FILENAME.txz" \