diff --git a/src/services/jsTyping.ts b/src/services/jsTyping.ts
index bfb62e396c6..d561734661b 100644
--- a/src/services/jsTyping.ts
+++ b/src/services/jsTyping.ts
@@ -173,6 +173,9 @@ namespace ts.JsTyping {
                 if (jsonDict.hasOwnProperty("dependencies")) {
                     mergeTypings(Object.keys(jsonDict.dependencies));
                 }
+                if (jsonDict.hasOwnProperty("devDependencies")) {
+                    mergeTypings(Object.keys(jsonDict.devDependencies));
+                }
             }
         }