diff --git a/sources/constants.ts b/sources/constants.ts
index 61eb0c1..b8a5131 100644
--- a/sources/constants.ts
+++ b/sources/constants.ts
@@ -14,7 +14,7 @@ export enum NodeType {
 export const HELP_COMMAND_INDEX = -1;
 
 export const HELP_REGEX = /^(-h|--help)(?:=([0-9]+))?$/;
-export const OPTION_REGEX = /^(--[a-z]+(?:-[a-z]+)*|-[a-zA-Z]+)$/;
+export const OPTION_REGEX = /^(--[a-z]+(?:-[a-z]+)*|-[a-z]+)$/i;
 export const BATCH_REGEX = /^-[a-zA-Z]{2,}$/;
 export const BINDING_REGEX = /^([^=]+)=([\s\S]*)$/;
 
diff --git a/tests/specs/advanced.test.ts b/tests/specs/advanced.test.ts
index b638b00..da31527 100644
--- a/tests/specs/advanced.test.ts
+++ b/tests/specs/advanced.test.ts
@@ -123,6 +123,22 @@ describe(`Advanced`, () => {
         expect(await runCli(cli, [`--help`])).toEqual(cli.usage(null));
       });
 
+      it(`should support camelCase in parameter name`, async () => {
+        expect.assertions(1);
+        const cli = new Cli();
+
+        class CommandA extends Command {
+          camelCase = Option.String(`--camelCase`);
+          async execute() {
+            expect(this.camelCase).toBe(`foo`);
+          }
+        }
+
+        cli.register(CommandA);
+
+        await runCli(cli, [`--camelCase=foo`]);
+      });
+
       it(`should print the general help if there are documented named commands apart the default one`, async () => {
         const cli = new Cli();
         cli.register(Builtins.HelpCommand);