diff --git a/include/pocketpy/common.h b/include/pocketpy/common.h
index 37fb000b..63be2e3e 100644
--- a/include/pocketpy/common.h
+++ b/include/pocketpy/common.h
@@ -19,6 +19,7 @@
 #include <initializer_list>
 #include <variant>
 #include <type_traits>
+#include <random>
 
 #define PK_VERSION				"1.1.2"
 
diff --git a/include/pocketpy/config.h b/include/pocketpy/config.h
index 7c1b25c9..48082b2c 100644
--- a/include/pocketpy/config.h
+++ b/include/pocketpy/config.h
@@ -84,10 +84,4 @@ namespace pkpy{
 #undef PK_ENABLE_COMPUTED_GOTO
 #endif
 
-/*************** module settings ***************/
-
-#define PK_MODULE_RE                1
-#define PK_MODULE_RANDOM            1
-#define PK_MODULE_EASING            1
-
 #endif
\ No newline at end of file
diff --git a/src/easing.cpp b/src/easing.cpp
index e5df787b..dddbeba7 100644
--- a/src/easing.cpp
+++ b/src/easing.cpp
@@ -1,9 +1,6 @@
 #include "pocketpy/easing.h"
 
 namespace pkpy{
-
-#if PK_MODULE_EASING
-
 // https://easings.net/
 
 static const double PI = 3.1415926545;
@@ -251,14 +248,4 @@ void add_module_easing(VM* vm){
 
 #undef EASE
 }
-
-
-#else
-
-void add_module_easing(VM* vm){
-    PK_UNUSED(vm);
-}
-
-#endif
-
 }   // namespace pkpy
\ No newline at end of file
diff --git a/src/random.cpp b/src/random.cpp
index 064f7d10..fab42055 100644
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -1,9 +1,5 @@
 #include "pocketpy/random.h"
 
-#if PK_MODULE_RANDOM
-
-#include <random>
-
 namespace pkpy{
 
 struct Random{
@@ -54,12 +50,4 @@ void add_module_random(VM* vm){
     vm->_exec(code, mod);
 }
 
-}   // namespace pkpy
-
-#else
-
-namespace pkpy{
-void add_module_random(VM* vm){ (void)vm; }
-}   // namespace pkpy
-
-#endif
\ No newline at end of file
+}   // namespace pkpy
\ No newline at end of file
diff --git a/src/re.cpp b/src/re.cpp
index 1831bff3..55de6e00 100644
--- a/src/re.cpp
+++ b/src/re.cpp
@@ -1,7 +1,5 @@
 #include "pocketpy/re.h"
 
-#if PK_MODULE_RE
-
 namespace pkpy{
 
 struct ReMatch {
@@ -81,12 +79,4 @@ void add_module_re(VM* vm){
     });
 }
 
-}   // namespace pkpy
-
-#else
-
-namespace pkpy{
-void add_module_re(VM* vm){ (void)vm; }
-}   // namespace pkpy
-
-#endif
\ No newline at end of file
+}   // namespace pkpy
\ No newline at end of file