diff --git a/package.json b/package.json
index 35b6d3e..3d1206b 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "@ngx-material-keyboard/core": "^0.1.1",
     "bootstrap": "^4.3.1",
     "font-awesome": "^4.7.0",
+    "hammerjs": "^2.0.8",
     "jquery": "^1.12.4",
     "lodash": "^4.17.15",
     "material-design-icons": "^3.0.1",