diff --git a/codecs/imagequant/build.sh b/codecs/imagequant/build.sh
index f9e7b45b..b2852655 100755
--- a/codecs/imagequant/build.sh
+++ b/codecs/imagequant/build.sh
@@ -11,12 +11,9 @@ echo "============================================="
 echo "Compiling libimagequant"
 echo "============================================="
 (
-  emcc \
-    ${OPTIMIZE} \
-    -I node_modules/libimagequant \
-    --std=c99 \
-    -c \
-    node_modules/libimagequant/{libimagequant,pam,mediancut,blur,mempool,kmeans,nearest}.c
+  cd node_modules/libimagequant
+  emconfigure ./configure --disable-sse
+  emmake make static -j`nproc`
 )
 echo "============================================="
 echo "Compiling wasm module"
@@ -31,9 +28,10 @@ echo "============================================="
     -s 'EXPORT_NAME="imagequant"' \
     -I node_modules/libimagequant \
     -o ./imagequant.js \
-    --std=c++11 *.o \
+    --std=c++11 \
     -x c++ \
-    imagequant.cpp
+    imagequant.cpp \
+    node_modules/libimagequant/libimagequant.a
 )
 echo "============================================="
 echo "Compiling wasm module done"
diff --git a/codecs/imagequant/imagequant.js b/codecs/imagequant/imagequant.js
index 6ff3c366..c4506d11 100644
--- a/codecs/imagequant/imagequant.js
+++ b/codecs/imagequant/imagequant.js
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+e.dynCall_jiji=function(){return(e.dynCall_jiji=e.asm.M).apply(null,arguments)};e.dynCall_iidiiii=function(){return(e.dynCall_iidiiii=e.asm.N).apply(null,arguments)};e.dynCall_vii=function(){return(e.dynCall_vii=e.asm.O).apply(null,arguments)};e.dynCall_viiiiii=function(){return(e.dynCall_viiiiii=e.asm.P).apply(null,arguments)};e.dynCall_viiiii=function(){return(e.dynCall_viiiii=e.asm.Q).apply(null,arguments)};e.dynCall_viiii=function(){return(e.dynCall_viiii=e.asm.R).apply(null,arguments)};
+e.asm=Mb;var Nb;e.then=function(a){if(Nb)a(e);else{var b=e.onRuntimeInitialized;e.onRuntimeInitialized=function(){b&&b();a(e)}}return e};N=function Ob(){Nb||Pb();Nb||(N=Ob)};
+function Pb(){function a(){if(!Nb&&(Nb=!0,e.calledRun=!0,!ka)){Ba(Da);Ba(Ea);if(e.onRuntimeInitialized)e.onRuntimeInitialized();if(e.postRun)for("function"==typeof e.postRun&&(e.postRun=[e.postRun]);e.postRun.length;){var b=e.postRun.shift();Fa.unshift(b)}Ba(Fa)}}if(!(0<M)){if(e.preRun)for("function"==typeof e.preRun&&(e.preRun=[e.preRun]);e.preRun.length;)Ga();Ba(Ca);0<M||(e.setStatus?(e.setStatus("Running..."),setTimeout(function(){setTimeout(function(){e.setStatus("")},1);a()},1)):a())}}
+e.run=Pb;if(e.preInit)for("function"==typeof e.preInit&&(e.preInit=[e.preInit]);0<e.preInit.length;)e.preInit.pop()();noExitRuntime=!0;Pb();
 
 
   return imagequant
diff --git a/codecs/imagequant/imagequant.wasm b/codecs/imagequant/imagequant.wasm
index f6ececd3..0c0d0863 100644
Binary files a/codecs/imagequant/imagequant.wasm and b/codecs/imagequant/imagequant.wasm differ
diff --git a/codecs/mozjpeg_enc/build.sh b/codecs/mozjpeg_enc/build.sh
index 3388aaa0..702a85aa 100755
--- a/codecs/mozjpeg_enc/build.sh
+++ b/codecs/mozjpeg_enc/build.sh
@@ -17,7 +17,7 @@ echo "============================================="
   cd node_modules/mozjpeg
   autoreconf -fiv
   emconfigure ./configure --without-simd
-  emmake make libjpeg.la
+  emmake make libjpeg.la -j`nproc`
 )
 echo "============================================="
 echo "Compiling mozjpeg done"
diff --git a/codecs/webp_dec/build.sh b/codecs/webp_dec/build.sh
index f9d4ab1d..ca4e7e57 100755
--- a/codecs/webp_dec/build.sh
+++ b/codecs/webp_dec/build.sh
@@ -31,7 +31,7 @@ test -n "$SKIP_LIBWEBP" || (
     --disable-neon \
     --disable-sse2 \
     --disable-sse4.1
-  emmake make
+  emmake make -j`nproc`
 )
 echo "============================================="
 echo "Compiling wasm bindings"
diff --git a/codecs/webp_enc/build.sh b/codecs/webp_enc/build.sh
index 01f78913..b76afe53 100755
--- a/codecs/webp_enc/build.sh
+++ b/codecs/webp_enc/build.sh
@@ -32,7 +32,7 @@ test -n "$SKIP_LIBWEBP" || (
     --disable-neon \
     --disable-sse2 \
     --disable-sse4.1
-  emmake make
+  emmake make -j`nproc`
 )
 echo "============================================="
 echo "Compiling wasm bindings"