diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd95226..7621095 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.1.1
+
+* fixed build
+
 ## 1.1.0
 
 * added `source` and `utm_source` to referrers
diff --git a/package-lock.json b/package-lock.json
index a6cb50d..77f95f4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,16 +1,19 @@
 {
   "name": "pirsch-sdk",
-  "version": "1.0.1",
+  "version": "1.1.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "pirsch-sdk",
-      "version": "1.0.1",
+      "version": "1.1.1",
       "license": "MIT",
       "dependencies": {
         "@types/node": "^15.12.4",
         "axios": "^0.21.1"
+      },
+      "devDependencies": {
+        "typescript": "^4.3.4"
       }
     },
     "node_modules/@types/node": {
@@ -44,6 +47,19 @@
           "optional": true
         }
       }
+    },
+    "node_modules/typescript": {
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.4.tgz",
+      "integrity": "sha512-uauPG7XZn9F/mo+7MrsRjyvbxFpzemRjKEZXS4AK83oP2KKOJPvb+9cO/gmnv8arWZvhnjVOXz7B49m1l0e9Ew==",
+      "dev": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=4.2.0"
+      }
     }
   },
   "dependencies": {
@@ -64,6 +80,12 @@
       "version": "1.13.3",
       "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.13.3.tgz",
       "integrity": "sha512-DUgl6+HDzB0iEptNQEXLx/KhTmDb8tZUHSeLqpnjpknR70H0nC2t9N73BK6fN4hOvJ84pKlIQVQ4k5FFlBedKA=="
+    },
+    "typescript": {
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.3.4.tgz",
+      "integrity": "sha512-uauPG7XZn9F/mo+7MrsRjyvbxFpzemRjKEZXS4AK83oP2KKOJPvb+9cO/gmnv8arWZvhnjVOXz7B49m1l0e9Ew==",
+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index ce01cce..7f5677f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pirsch-sdk",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "JavaScript client SDK for Pirsch.",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -28,5 +28,8 @@
   "dependencies": {
     "@types/node": "^15.12.4",
     "axios": "^0.21.1"
+  },
+  "devDependencies": {
+    "typescript": "^4.3.4"
   }
 }