diff --git a/src/configParser.ts b/src/configParser.ts
index ee52587..ce9e627 100644
--- a/src/configParser.ts
+++ b/src/configParser.ts
@@ -164,7 +164,9 @@ export class ConfigParser {
           r1cs: true,
           json: false,
           prime: false,
-          O: 0,
+          c: false,
+          wat: false,
+          O: c.compileOptions ? c.compileOptions.O : 0,
           verbose: false,
         },
       };
diff --git a/src/types.ts b/src/types.ts
index 02cc63a..69cc89a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -19,6 +19,7 @@ export type BuildCircuitInfo = {
   powerOfTauFp?: string;
   proofType?: SnarkType;
   compilationMode?: CompilationMode;
+  compileOptions?: CompileOptions;
 };
 
 export type CompilationMode = 'wasm' | 'c';
@@ -75,6 +76,8 @@ export type CompileOptions = {
   sym: boolean;
   r1cs: boolean;
   json: boolean;
+  c: boolean;
+  wat: boolean;
   prime: number | boolean;
   O: number;
   verbose: boolean;
diff --git a/src/vendors/circom_tester/wasm/tester.js b/src/vendors/circom_tester/wasm/tester.js
index 21ed96e..cf499e2 100644
--- a/src/vendors/circom_tester/wasm/tester.js
+++ b/src/vendors/circom_tester/wasm/tester.js
@@ -87,10 +87,13 @@ async function compile(fileName, options) {
   if (options.sym) flags += '--sym ';
   if (options.r1cs) flags += '--r1cs ';
   if (options.json) flags += '--json ';
+  if (options.wat) flags += '--wat ';
+  if (options.c) flags += '--c ';
   if (options.output) flags += '--output ' + options.output + ' ';
   if (options.prime) flags += '--prime ' + options.prime + ' ';
   if (options.O === 0) flags += '--O0 ';
   if (options.O === 1) flags += '--O1 ';
+  if (options.O === 2) flags += '--O2 ';
   if (options.verbose) flags += '--verbose ';
 
   try {