diff --git a/.circleci/config.yml b/.circleci/config.yml
index d75f8b0271..93c3d9b66e 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -19,7 +19,7 @@ jobs:
 
       - run:
           name: Install Emscripten (for GDevelop.js)
-          command: git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install sdk-1.37.37-64bit && ./emsdk activate sdk-1.37.37-64bit && cd ..
+          command: git clone https://github.com/juj/emsdk.git && cd emsdk && ./emsdk install sdk-fastcomp-1.37.37-64bit && ./emsdk activate sdk-fastcomp-1.37.37-64bit && cd ..
 
       - run:
           name: Install Wine for Electron builder
diff --git a/.travis.yml b/.travis.yml
index d5d1808ad6..5b53f454d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -63,9 +63,8 @@ install:
 # Install Emscripten (for GDevelop.js)
   - git clone https://github.com/juj/emsdk.git
   - cd emsdk
-  - ./emsdk update
-  - ./emsdk install sdk-1.37.37-64bit
-  - ./emsdk activate sdk-1.37.37-64bit
+  - ./emsdk install sdk-fastcomp-1.37.37-64bit
+  - ./emsdk activate sdk-fastcomp-1.37.37-64bit
   - source ./emsdk_env.sh
   - cd ..
 # Install GDevelop.js dependencies and compile it
diff --git a/GDevelop.js/Readme.md b/GDevelop.js/Readme.md
index ae067632ac..a4d7af523b 100644
--- a/GDevelop.js/Readme.md
+++ b/GDevelop.js/Readme.md
@@ -19,8 +19,8 @@ This is the port of GDevelop core classes to JavaScript. This allow [GDevelop Co
 | `git clone https://github.com/juj/emsdk.git` | `git clone https://github.com/juj/emsdk.git` |
 | `cd emsdk`   | `cd emsdk`|
 | `./emsdk update` | `emsdk update` |
-| `./emsdk install sdk-1.37.37-64bit` | `emsdk install sdk-1.37.37-64bit` |
-| `./emsdk activate sdk-1.37.37-64bit` | `emsdk activate sdk-1.37.37-64bit` |
+| `./emsdk install sdk-fastcomp-1.37.37-64bit` | `emsdk install sdk-fastcomp-1.37.37-64bit` |
+| `./emsdk activate sdk-fastcomp-1.37.37-64bit` | `emsdk activate sdk-fastcomp-1.37.37-64bit` |
 | `source ./emsdk_env.sh` | `emsdk_env.bat` |
 
 > For up-to-date information, check again [Emscripten installation instructions](http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html).