diff --git a/povray_gcc/build.sh b/povray_gcc/build.sh
index 0314233..e9719dd 100644
--- a/povray_gcc/build.sh
+++ b/povray_gcc/build.sh
@@ -7,4 +7,4 @@ cd unix/
 sh prebuild.sh
 cd ../
 ./configure COMPILED_BY="$NAME <$EMAIL>" LDFLAGS="-Wl,-V"
-make -j
\ No newline at end of file
+make -j2
\ No newline at end of file
diff --git a/povray_wasm/build.sh b/povray_wasm/build.sh
index 3ba048d..1ae8f57 100644
--- a/povray_wasm/build.sh
+++ b/povray_wasm/build.sh
@@ -54,7 +54,7 @@ ARGS=(
 BOOST_ROOT=$BOOST_ROOT emconfigure ./configure "${ARGS[@]}"
 
 # build dependencies
-emmake make -j
+emmake make -j2
 
 exit
 
diff --git a/povray_wasm/build_alpine.sh b/povray_wasm/build_alpine.sh
index 4eb5d73..5aa7620 100644
--- a/povray_wasm/build_alpine.sh
+++ b/povray_wasm/build_alpine.sh
@@ -5,4 +5,4 @@ cd unix/
 sh prebuild.sh
 cd ../
 emconfigure ./configure COMPILED_BY="$NAME <$EMAIL>" LDFLAGS="-Wl,-V"
-emmake make -j
\ No newline at end of file
+emmake make -j2
\ No newline at end of file