diff --git a/package-lock.json b/package-lock.json
index 58baa87..e79492f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2456,6 +2456,16 @@
         "@types/istanbul-lib-report": "*"
       }
     },
+    "@types/jest": {
+      "version": "26.0.23",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-26.0.23.tgz",
+      "integrity": "sha512-ZHLmWMJ9jJ9PTiT58juykZpL7KjwJywFN3Rr2pTSkyQfydf/rk22yS7W8p5DaVUMQ2BQC7oYiU3FjbTM/mYrOA==",
+      "dev": true,
+      "requires": {
+        "jest-diff": "^26.0.0",
+        "pretty-format": "^26.0.0"
+      }
+    },
     "@types/js-cookie": {
       "version": "2.2.6",
       "resolved": "https://registry.npmjs.org/@types/js-cookie/-/js-cookie-2.2.6.tgz",
diff --git a/package.json b/package.json
index f788117..67e34dc 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
     "@types/debounce": "^1.2.0",
     "@types/file-saver": "^2.0.1",
     "@types/history": "^4.7.8",
+    "@types/jest": "^26.0.23",
     "@types/js-cookie": "^2.2.4",
     "@types/lunr": "^2.3.3",
     "@types/md5": "^2.3.0",
diff --git a/src/imports.d.ts b/src/imports.d.ts
new file mode 100644
index 0000000..7c26416
--- /dev/null
+++ b/src/imports.d.ts
@@ -0,0 +1,2 @@
+declare module '*.jng'
+declare module '*.png'