diff --git a/gymz/gym_wrapper.py b/gymz/gym_wrapper.py
index f5386a8..26c1c0d 100644
--- a/gymz/gym_wrapper.py
+++ b/gymz/gym_wrapper.py
@@ -94,7 +94,7 @@ def execute_action(self):
         # Gym expects actions in different format depending on type of
         # action space
         if isinstance(self._env.action_space, gym.spaces.Discrete):
-            action = self._command_buffer[0][0]['value']
+            action = int(self._command_buffer[0][0]['value'])
         else:
             action = [self._command_buffer[0][0]['value']]
 
diff --git a/gymz/messages.py b/gymz/messages.py
index 154e283..b9ea0c3 100644
--- a/gymz/messages.py
+++ b/gymz/messages.py
@@ -6,6 +6,6 @@
 def to_message(low, high, value):
     assert(np.shape(low) == np.shape(high) == np.shape(value))
     try:
-        return [{'min': low[i], 'max': high[i], 'value': value[i]} for i in range(len(low))]
+        return [{'min': float(low[i]), 'max': float(high[i]), 'value': float(value[i])} for i in range(len(low))]
     except TypeError:
-        return [{'min': low, 'max': high, 'value': value}]
+        return [{'min': float(low), 'max': float(high), 'value': float(value)}]