diff --git a/cloud-core/src/main/java/cloud/commandframework/arguments/CommandArgument.java b/cloud-core/src/main/java/cloud/commandframework/arguments/CommandArgument.java
index 69b07077..5bbf6070 100644
--- a/cloud-core/src/main/java/cloud/commandframework/arguments/CommandArgument.java
+++ b/cloud-core/src/main/java/cloud/commandframework/arguments/CommandArgument.java
@@ -54,7 +54,7 @@ public class CommandArgument<C, T> implements Comparable<CommandArgument<?, ?>>
     /**
      * Pattern for command argument names
      */
-    private static final Pattern NAME_PATTERN = Pattern.compile("[A-Za-z0-9]+");
+    private static final Pattern NAME_PATTERN = Pattern.compile("[A-Za-z0-9\\-_]+");
 
     /**
      * Indicates whether or not the argument is required