diff --git a/.gitignore b/.gitignore
index be3f73f..ce69ef8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,5 @@ wheelhouse/
 *.mo
 webpack-build-config.json
 node_modules/
+package-lock.json
+*.lock
diff --git a/piwik/package-lock.json b/piwik/package-lock.json
deleted file mode 100644
index 56dd324..0000000
--- a/piwik/package-lock.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-  "name": "indico-plugin-piwik",
-  "version": "1.0.0",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "jqtree": {
-      "version": "1.4.5",
-      "resolved": "https://registry.npmjs.org/jqtree/-/jqtree-1.4.5.tgz",
-      "integrity": "sha512-IHBW/tN0QrfiNr8MJwIsw6deCzrd7GdcG2cpT5tsKnBeuF4d4NlHNsTv0pOywiGY9cH2NVKyoMhp8A9O8I3Wtw==",
-      "requires": {
-        "jquery": "3.3.1"
-      }
-    },
-    "jquery": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/jquery/-/jquery-3.3.1.tgz",
-      "integrity": "sha512-Ubldcmxp5np52/ENotGxlLe6aGMvmF4R8S6tZjsP6Knsaxd/xp3Zrh50cG93lR6nPXyUFwzN3ZSOQI0wRJNdGg=="
-    }
-  }
-}