diff --git a/scripts/build.sh b/scripts/build.sh
index cf354fa..643be55 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -26,7 +26,7 @@ if [ -z "$CXX" ]; then
     CXX="c++"
 fi
 if [ -z "$CXXFLAGS" ]; then
-    CXXFLAGS="-std=c++20 -Wall"
+    CXXFLAGS="-std=c++20 -Wall -Wextra"
 fi
 CXX_WITH_FLAGS="$CXX $CXXFLAGS"
 
diff --git a/scripts/test.sh b/scripts/test.sh
index 936c434..fc289e1 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -26,7 +26,7 @@ if [ -z "$CXX" ]; then
     CXX="c++"
 fi
 if [ -z "$CXXFLAGS" ]; then
-    CXXFLAGS="-std=c++20 -Wall"
+    CXXFLAGS="-std=c++20 -Wall -Wextra"
 fi
 CXX_WITH_FLAGS="$CXX $CXXFLAGS"