diff --git a/src/languages/c.ts b/src/languages/c.ts
index 1c38457..682b0cd 100644
--- a/src/languages/c.ts
+++ b/src/languages/c.ts
@@ -10,7 +10,7 @@ export const lang =  {
         // write a shell script or some other stuff, 
         // and put it to your sandbox.
         executable: "/usr/bin/gcc",
-        parameters: ["gcc", sourcePath, "-o", `${outputDirectory}/a.out`, "-O2", "-fdiagnostics-color=always", "-DONLINE_JUDGE"],
+        parameters: ["gcc", sourcePath, "-o", `${outputDirectory}/a.out`, "-O2", "-fdiagnostics-color=always", "-DONLINE_JUDGE", "-mx32"],
         time: 5000,
         memory: 1024 * 1024 * 1024,
         process: 10,
diff --git a/src/languages/cpp.ts b/src/languages/cpp.ts
index 606789d..b1b8020 100644
--- a/src/languages/cpp.ts
+++ b/src/languages/cpp.ts
@@ -10,7 +10,7 @@ export const lang = {
         // write a shell script or some other stuff, 
         // and put it to your sandbox.
         executable: "/usr/bin/g++",
-        parameters: ["g++", sourcePath, "-o", `${outputDirectory}/a.out`, "-O2", "-fdiagnostics-color=always", "-DONLINE_JUDGE"],
+        parameters: ["g++", sourcePath, "-o", `${outputDirectory}/a.out`, "-O2", "-fdiagnostics-color=always", "-DONLINE_JUDGE", "-mx32"],
         time: 5000,
         memory: 1024 * 1024 * 1024,
         process: 10,
diff --git a/src/languages/cpp11.ts b/src/languages/cpp11.ts
index fd6b111..7959902 100644
--- a/src/languages/cpp11.ts
+++ b/src/languages/cpp11.ts
@@ -10,7 +10,7 @@ export const lang =  {
         // write a shell script or some other stuff, 
         // and put it to your sandbox.
         executable: "/usr/bin/g++",
-        parameters: ["g++", sourcePath, "-o", `${outputDirectory}/a.out`, "-std=c++11", "-O2", "-fdiagnostics-color=always", "-DONLINE_JUDGE"],
+        parameters: ["g++", sourcePath, "-o", `${outputDirectory}/a.out`, "-std=c++11", "-O2", "-fdiagnostics-color=always", "-DONLINE_JUDGE", "-mx32"],
         time: 5000,
         memory: 1024 * 1024 * 1024,
         process: 10,