diff --git a/README.md b/README.md
index 9f39ba7..a2e74c9 100644
--- a/README.md
+++ b/README.md
@@ -2,30 +2,6 @@
 
 Command-line tool to encode and decode arbitrary protobuf data.
 
-
-## Installation
-
-This program requires Crystal. See: https://crystal-lang.org/install/
-
-### Standalone
-
-1. Clone: `git clone https://github.com/iv-org/protodec && cd protodec`
-2. Build: `crystal build src/protodec.cr`
-3. See [Usage](#Usage) below
-
-
-### As a Crystal library
-
-Add this to your application's `shard.yml`:
-
-```yaml
-dependencies:
-  protodec:
-    github: iv-org/protodec
-    version: ~> 0.1.5
-```
-
-
 ## Usage
 
 ```
@@ -81,13 +57,9 @@ $ echo 'CkEKCeOCj+OBn+OBlxDSCSIQWmQ730+N8z8tsp3vp8YJQCoSCAESBzA4MDAwMDAaBQ26sSZE
 }
 ```
 
-## Windows
-
-Windows users can run the binaries in a linux-on-windows tool (like Git bash or WSL) or use the official [protobuf binaries](https://github.com/protocolbuffers/protobuf/releases) to encode/decode protobuf data.
-
 ## Contributing
 
-1. Fork it (<https://github.com/iv-org/protodec/fork>)
+1. Fork it (<https://github.com/omarroth/protodec/fork>)
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)
 4. Push to the branch (`git push origin my-new-feature`)
diff --git a/shard.yml b/shard.yml
index 33c49db..d881c30 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: protodec
-version: 0.1.5
+version: 0.1.4
 
 authors:
   - Omar Roth <omarroth@protonmail.com>
diff --git a/src/protodec/utils.cr b/src/protodec/utils.cr
index 6c7c509..b65a43c 100644
--- a/src/protodec/utils.cr
+++ b/src/protodec/utils.cr
@@ -468,7 +468,9 @@ module Protodec
       Any.new(raw.clone)
     end
 
-    def self.cast_json(object : Hash)
+    def self.cast_json(object)
+      raise "Invalid type" if !object.is_a?(Hash)
+
       JSON::Any.new(object.transform_values do |value|
         case value
         when .is_a?(Hash)