diff --git a/alpine/kasmvncserver/APKBUILD b/alpine/kasmvncserver/APKBUILD
index e67e4c2..0030b35 100644
--- a/alpine/kasmvncserver/APKBUILD
+++ b/alpine/kasmvncserver/APKBUILD
@@ -16,6 +16,7 @@ depends="
         libwebp
         libxfont2
         libxshmfence
+        libxtst
         mcookie
         mesa-gbm
         openssl