diff --git a/langserver/package-lock.json b/langserver/package-lock.json
index 1b60bfa..6445af2 100644
--- a/langserver/package-lock.json
+++ b/langserver/package-lock.json
@@ -10,6 +10,14 @@
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       "dev": true
     },
+    "agent-base": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.3.0.tgz",
+      "integrity": "sha512-salcGninV0nPrwpGNn4VTXBb1SOuXQBiqbrNXoeizJsHrsL6ERFM2Ne3JUSBWRE6aeNJI2ROP/WEEIDUiDe3cg==",
+      "requires": {
+        "es6-promisify": "^5.0.0"
+      }
+    },
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -71,6 +79,14 @@
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
     },
+    "debug": {
+      "version": "3.2.6",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+      "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+      "requires": {
+        "ms": "^2.1.1"
+      }
+    },
     "duplexer2": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/duplexer2/-/duplexer2-0.1.4.tgz",
@@ -79,6 +95,19 @@
         "readable-stream": "^2.0.2"
       }
     },
+    "es6-promise": {
+      "version": "4.2.8",
+      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.8.tgz",
+      "integrity": "sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w=="
+    },
+    "es6-promisify": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/es6-promisify/-/es6-promisify-5.0.0.tgz",
+      "integrity": "sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=",
+      "requires": {
+        "es6-promise": "^4.0.3"
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -113,6 +142,15 @@
       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
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     },
+    "https-proxy-agent": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-3.0.0.tgz",
+      "integrity": "sha512-y4jAxNEihqvBI5F3SaO2rtsjIOnnNA8sEbuiP+UhJZJHeM2NRm6c09ax2tgqme+SgUUvjao2fJXF4h3D6Cb2HQ==",
+      "requires": {
+        "agent-base": "^4.3.0",
+        "debug": "^3.1.0"
+      }
+    },
     "inflight": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
@@ -157,6 +195,14 @@
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
       "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
     },
+    "mixpanel": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/mixpanel/-/mixpanel-0.11.0.tgz",
+      "integrity": "sha512-TS7AkCmfC+vGshlCOjEcITFoFxlt5fdSEqmN+d+pTXAhE5v+jPQW2uUcn9W+Oq4NVXz+kdskU09dsm9vmNl0ig==",
+      "requires": {
+        "https-proxy-agent": "3.0.0"
+      }
+    },
     "mkdirp": {
       "version": "0.5.5",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
@@ -165,6 +211,11 @@
         "minimist": "^1.2.5"
       }
     },
+    "ms": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+      "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+    },
     "once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
diff --git a/langserver/package.json b/langserver/package.json
index 19fa4cf..2e1903e 100644
--- a/langserver/package.json
+++ b/langserver/package.json
@@ -10,6 +10,7 @@
   "license": "ISC",
   "dependencies": {
     "java-mti": "adelphes/java-mti#d0e1e45",
+    "mixpanel": "^0.11.0",
     "vscode-languageserver": "6.1.1",
     "vscode-languageserver-textdocument": "1.0.1",
     "vscode-uri": "2.1.2"