diff --git a/Makefile b/Makefile
index 27e2b9698..b5489fd57 100644
--- a/Makefile
+++ b/Makefile
@@ -190,7 +190,7 @@ ccache/emcc:
 	if hash ccache &>/dev/null; then \
     ln -s `which ccache` $(PYODIDE_ROOT)/ccache/emcc ; \
   else \
-    ln -s emsdk/emsdk/emscripten/tag-1.38.10/emcc $(PYODIDE_ROOT)/ccache/emcc; \
+    ln -s emsdk/emsdk/emscripten/tag-1.38.12/emcc $(PYODIDE_ROOT)/ccache/emcc; \
   fi
 
 
@@ -199,7 +199,7 @@ ccache/em++:
 	if hash ccache &>/dev/null; then \
     ln -s `which ccache` $(PYODIDE_ROOT)/ccache/em++ ; \
   else \
-    ln -s emsdk/emsdk/emscripten/tag-1.38.10/em++ $(PYODIDE_ROOT)/ccache/em++; \
+    ln -s emsdk/emsdk/emscripten/tag-1.38.12/em++ $(PYODIDE_ROOT)/ccache/em++; \
   fi
 
 
diff --git a/Makefile.envs b/Makefile.envs
index dcc1704f7..7f714d9b8 100644
--- a/Makefile.envs
+++ b/Makefile.envs
@@ -3,8 +3,8 @@ export PATH := $(PYODIDE_ROOT)/ccache:$(PYODIDE_ROOT)/emsdk/emsdk:$(PYODIDE_ROOT
 export EMSDK = $(PYODIDE_ROOT)/emsdk/emsdk
 export EM_CONFIG = $(PYODIDE_ROOT)/emsdk/emsdk/.emscripten
 export EM_CACHE = $(PYODIDE_ROOT)/emsdk/emsdk/.emscripten_cache
-export EMSCRIPTEN = $(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-1.38.10
-export BINARYEN_ROOT = $(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-1.38.10_64bit_binaryen
+export EMSCRIPTEN = $(PYODIDE_ROOT)/emsdk/emsdk/emscripten/tag-1.38.12
+export BINARYEN_ROOT = $(PYODIDE_ROOT)/emsdk/emsdk/binaryen/tag-1.38.12_64bit_binaryen
 
 export PYVERSION=3.7.0
 export PYMINOR=$(basename $(PYVERSION))
diff --git a/emsdk/Makefile b/emsdk/Makefile
index fb75fd548..153de8622 100644
--- a/emsdk/Makefile
+++ b/emsdk/Makefile
@@ -9,13 +9,13 @@ emsdk/.complete:
 	sed -i -e "s#CPU_CORES = max(multiprocessing.cpu_count()-1, 1)#CPU_CORES = 3#g" emsdk/emsdk
 	( \
 		cd emsdk ; \
-		./emsdk install --build=Release sdk-tag-1.38.10-64bit binaryen-tag-1.38.10-64bit ; \
+		./emsdk install --build=Release sdk-tag-1.38.12-64bit binaryen-tag-1.38.12-64bit ; \
 		cd .. ; \
 		(cat patches/*.patch | patch -p1) ; \
-		cd emsdk/binaryen/tag-1.38.10_64bit_binaryen/ ; \
+		cd emsdk/binaryen/tag-1.38.12_64bit_binaryen/ ; \
     make ; \
 	  cd ../.. ; \
-		./emsdk activate --embedded --build=Release sdk-tag-1.38.10-64bit binaryen-tag-1.38.10-64bit ; \
+		./emsdk activate --embedded --build=Release sdk-tag-1.38.12-64bit binaryen-tag-1.38.12-64bit ; \
     touch .complete \
 	)
 
diff --git a/emsdk/patches/lz4_c.patch b/emsdk/patches/lz4_c.patch
index f8d93eb57..6cd6ef6b3 100644
--- a/emsdk/patches/lz4_c.patch
+++ b/emsdk/patches/lz4_c.patch
@@ -1,4 +1,4 @@
-diff --git a/emsdk/emscripten/tag-1.38.10/src/library_lz4.js b/emsdk/emscripten/tag-1.38.10/src/library_lz4.js
+diff --git a/emsdk/emscripten/tag-1.38.12/src/library_lz4.js b/emsdk/emscripten/tag-1.38.12/src/library_lz4.js
 index 4c3f583b7..5291002a4 100644
 --- a/src/library_lz4.js
 +++ b/src/library_lz4.js
diff --git a/emsdk/patches/num_params.patch b/emsdk/patches/num_params.patch
index e46c966d0..c9850fede 100644
--- a/emsdk/patches/num_params.patch
+++ b/emsdk/patches/num_params.patch
@@ -1,7 +1,7 @@
 diff --git a/emsdk/binaryen/master/src/passes/FuncCastEmulation.cpp b/emsdk/binaryen/master/src/passes/FuncCastEmulation.cpp
 index 013e9403..d95fc282 100644
---- a/emsdk/binaryen/tag-1.38.10/src/passes/FuncCastEmulation.cpp
-+++ b/emsdk/binaryen/tag-1.38.10/src/passes/FuncCastEmulation.cpp
+--- a/emsdk/binaryen/tag-1.38.12/src/passes/FuncCastEmulation.cpp
++++ b/emsdk/binaryen/tag-1.38.12/src/passes/FuncCastEmulation.cpp
 @@ -39,7 +39,7 @@ namespace wasm {
  // This should be enough for everybody. (As described above, we need this
  // to match when dynamically linking, and also dynamic linking is why we
diff --git a/tools/file_packager.py b/tools/file_packager.py
index d0a09186a..db5bdd80c 100644
--- a/tools/file_packager.py
+++ b/tools/file_packager.py
@@ -69,7 +69,7 @@ sys.path.insert(
         os.path.abspath(__file__)
       )
     ),
-    'emsdk', 'emsdk', 'emscripten', 'tag-1.38.10'
+    'emsdk', 'emsdk', 'emscripten', 'tag-1.38.12'
   )
 )