diff --git a/setup.py b/setup.py
index 8383492..fd2ea07 100644
--- a/setup.py
+++ b/setup.py
@@ -53,7 +53,9 @@
 
             # Sandboxed compilers:
             'gcc4_8_2_c99 = sio.compilers.gcc:run_c_gcc4_8_2_c99',
+            'gcc12_2_0_c17 = sio.compilers.gcc:run_c_gcc12_2_0_c17',
             'g++4_8_2_cpp11 = sio.compilers.gcc:run_cpp_gcc4_8_2_cpp11',
+            'g++12_2_0_cpp20 = sio.compilers.gcc:run_cpp_gcc12_2_0_cpp20',
             'fpc2_6_2 = sio.compilers.fpc:run_pas_fpc2_6_2',
             'java1_8 = sio.compilers.java:run_java1_8',
 
diff --git a/sio/compilers/gcc.py b/sio/compilers/gcc.py
index af72464..41686b8 100644
--- a/sio/compilers/gcc.py
+++ b/sio/compilers/gcc.py
@@ -11,6 +11,12 @@ def gcc_4_8_2_c99(cls):
         obj.options = ['-std=gnu99', '-static', '-O2', '-s', '-lm']
         return obj
 
+    @classmethod
+    def gcc_12_2_0_c17(cls):
+        obj = cls('gcc.12_2_0')
+        obj.options = ['-std=c17', '-static', '-O3', '-lm']
+        return obj
+
 
 class CPPCompiler(CStyleCompiler):
     lang = 'cpp'
@@ -22,24 +28,41 @@ def gcc_4_8_2_cpp11(cls):
         obj.options = ['-std=c++11', '-static', '-O2', '-s', '-lm']
         return obj
 
+    @classmethod
+    def gcc_12_2_0_cpp20(cls):
+        obj = cls('gcc.12_2_0')
+        obj.compiler = 'g++'
+        obj.options = ['-std=c++20', '-static', '-O3']
+        return obj
+
 
 def run_gcc4_8_2_c99(environ):
     return CCompiler.gcc_4_8_2_c99().compile(environ)
 
 
+def run_gcc12_2_0_c17(environ):
+    return CCompiler.gcc_12_2_0_c17().compile(environ)
+
+
 def run_gcc_default(environ):
-    return CCompiler.gcc_4_8_2_c99().compile(environ)
+    return CCompiler.gcc_12_2_0_c17().compile(environ)
 
 
 def run_gplusplus4_8_2_cpp11(environ):
     return CPPCompiler.gcc_4_8_2_cpp11().compile(environ)
 
 
+def run_gplusplus12_2_0_cpp20(environ):
+    return CPPCompiler.gcc_12_2_0_cpp20().compile(environ)
+
+
 def run_gplusplus_default(environ):
-    return CPPCompiler.gcc_4_8_2_cpp11().compile(environ)
+    return CPPCompiler.gcc_12_2_0_cpp20().compile(environ)
 
 
 run_c_default = run_gcc_default
 run_c_gcc4_8_2_c99 = run_gcc4_8_2_c99
+run_c_gcc12_2_0_c17 = run_gcc12_2_0_c17
 run_cpp_default = run_gplusplus_default
 run_cpp_gcc4_8_2_cpp11 = run_gplusplus4_8_2_cpp11
+run_cpp_gcc12_2_0_cpp20 = run_gplusplus12_2_0_cpp20
diff --git a/sio/workers/executors.py b/sio/workers/executors.py
index cdb60d4..31b5aa7 100644
--- a/sio/workers/executors.py
+++ b/sio/workers/executors.py
@@ -800,7 +800,7 @@ class PRootExecutor(BaseExecutor):
     def __init__(self, sandbox):
         """``sandbox`` has to be a sandbox name."""
         self.chroot = get_sandbox(sandbox)
-        self.proot = SandboxExecutor('proot-sandbox')
+        self.proot = SandboxExecutor('proot-sandbox_amd64')
 
         self.options = []
         with self.chroot:
diff --git a/sio/workers/test/sources/inwer_argument.c b/sio/workers/test/sources/inwer_argument.c
index 6283f69..4bfd05a 100644
--- a/sio/workers/test/sources/inwer_argument.c
+++ b/sio/workers/test/sources/inwer_argument.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <string.h>
 
 int main(int argc, char *argv[]) {
     if (argc != 2) {
diff --git a/sio/workers/test/sources/output-too-long.c b/sio/workers/test/sources/output-too-long.c
index e26881e..150aee0 100644
--- a/sio/workers/test/sources/output-too-long.c
+++ b/sio/workers/test/sources/output-too-long.c
@@ -1,4 +1,3 @@
-#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>