diff --git a/.flowconfig b/.flowconfig
index 4b51cb2fd..08d02717a 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -81,7 +81,7 @@ esproposal.class_instance_fields=enable
 munge_underscores=true
 
 module.name_mapper='^image![a-zA-Z0-9$_-]+$' -> 'GlobalImageStub'
-module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\)$' -> 'RelativeImageStub'
+module.name_mapper='^[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> 'RelativeImageStub'
 
 suppress_type=$FlowIssue
 suppress_type=$FlowFixMe
diff --git a/local-cli/server/runServer.js b/local-cli/server/runServer.js
index 57c0be9d2..2aa9d208b 100644
--- a/local-cli/server/runServer.js
+++ b/local-cli/server/runServer.js
@@ -83,7 +83,7 @@ function getPackagerServer(args, config) {
       'bmp', 'gif', 'jpg', 'jpeg', 'png', 'psd', 'svg', 'webp', // Image formats
       'm4v', 'mov', 'mp4', 'mpeg', 'mpg', 'webm', // Video formats
       'aac', 'aiff', 'caf', 'm4a', 'mp3', 'wav', // Audio formats
-      'html', // Document formats
+      'html', 'pdf', // Document formats
     ],
     resetCache: args.resetCache || args['reset-cache'],
     verbose: args.verbose,
diff --git a/packager/react-packager/src/Server/index.js b/packager/react-packager/src/Server/index.js
index f7b4b354c..1856fc96f 100644
--- a/packager/react-packager/src/Server/index.js
+++ b/packager/react-packager/src/Server/index.js
@@ -62,7 +62,7 @@ const validateOpts = declareOpts({
       'bmp', 'gif', 'jpg', 'jpeg', 'png', 'psd', 'svg', 'webp', // Image formats
       'm4v', 'mov', 'mp4', 'mpeg', 'mpg', 'webm', // Video formats
       'aac', 'aiff', 'caf', 'm4a', 'mp3', 'wav', // Audio formats
-      'html', // Document formats
+      'html', 'pdf', // Document formats
     ],
   },
   transformTimeoutInterval: {