diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index c187e00e35..29fb6db54d 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-20.04
     container:
       # If you change this version, change the number in the cache step too.
-      image: emscripten/emsdk:3.1.28
+      image: emscripten/emsdk:3.1.37
 
     steps:
     - name: Checkout
@@ -30,7 +30,7 @@ jobs:
       uses: actions/cache@v3
       with:
         path: /emsdk/upstream/emscripten/cache
-        key: 3.1.28-${{ runner.os }}
+        key: 3.1.37-${{ runner.os }}
 
     - name: Patch Emscripten to support LZMA
       run: |
@@ -65,7 +65,7 @@ jobs:
 
         echo "::group::Build"
         echo "Running on $(nproc) cores"
-        cmake --build . -j $(nproc) -t openttd
+        cmake --build . -j $(nproc) --target openttd
         echo "::endgroup::"
 
   linux:
diff --git a/.github/workflows/preview_build.yml b/.github/workflows/preview_build.yml
index b1d7b917ef..b73d993665 100644
--- a/.github/workflows/preview_build.yml
+++ b/.github/workflows/preview_build.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     container:
       # If you change this version, change the number in the cache step too.
-      image: emscripten/emsdk:3.1.28
+      image: emscripten/emsdk:3.1.37
 
     steps:
     - name: Update deployment status to in progress
@@ -45,7 +45,7 @@ jobs:
       uses: actions/cache@v3
       with:
         path: /emsdk/upstream/emscripten/cache
-        key: 3.1.28-${{ runner.os }}
+        key: 3.1.37-${{ runner.os }}
 
     - name: Patch Emscripten to support LZMA
       run: |
@@ -83,7 +83,7 @@ jobs:
 
         echo "::group::Build"
         echo "Running on $(nproc) cores"
-        emmake make -j$(nproc)
+        cmake --build . -j $(nproc) --target openttd
         echo "::endgroup::"
 
     - name: Publish preview
diff --git a/os/emscripten/Dockerfile b/os/emscripten/Dockerfile
index ae3579ec0a..e92858df87 100644
--- a/os/emscripten/Dockerfile
+++ b/os/emscripten/Dockerfile
@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:3.1.28
+FROM emscripten/emsdk:3.1.37
 
 COPY emsdk-liblzma.patch /
 RUN cd /emsdk/upstream/emscripten && patch -p1 < /emsdk-liblzma.patch
diff --git a/os/emscripten/emsdk-liblzma.patch b/os/emscripten/emsdk-liblzma.patch
index fbb24e7ca9..7bfdd47de2 100644
--- a/os/emscripten/emsdk-liblzma.patch
+++ b/os/emscripten/emsdk-liblzma.patch
@@ -1,30 +1,20 @@
-From 90dd4d4c6b1cedec338ff5b375fffca93700f7bc Mon Sep 17 00:00:00 2001
+From 84d0e9112d5c87a714abd21ec8547921f46f37b5 Mon Sep 17 00:00:00 2001
 From: milek7 <me@milek7.pl>
 Date: Tue, 8 Dec 2020 01:03:31 +0100
 Subject: [PATCH] Add liblzma port
 
 ---
-Source: https://github.com/emscripten-core/emscripten/pull/12990
+ src/settings.js        |   4 ++
+ tools/ports/liblzma.py | 151 +++++++++++++++++++++++++++++++++++++++++
+ tools/settings.py      |   1 +
+ 3 files changed, 156 insertions(+)
+ create mode 100644 tools/ports/liblzma.py
 
-Modifed by OpenTTD to have the bare minimum needed to work. Otherwise there
-are constantly conflicts when trying to apply this patch to different versions
-of emsdk.
-
-diff --git a/tools/settings.py b/tools/settings.py
---- a/tools/settings.py
-+++ b/tools/settings.py
-@@ -40,6 +40,7 @@ PORTS_SETTINGS = {
-     'USE_SDL_NET',
-     'USE_SDL_GFX',
-     'USE_LIBJPEG',
-+    'USE_LIBLZMA',
-     'USE_OGG',
-     'USE_REGAL',
-     'USE_BOOST_HEADERS',
 diff --git a/src/settings.js b/src/settings.js
+index f93140d..7b6bec9 100644
 --- a/src/settings.js
 +++ b/src/settings.js
-@@ -1450,6 +1450,10 @@ var USE_GIFLIB = false;
+@@ -1451,6 +1451,10 @@ var USE_GIFLIB = false;
  // [compile+link]
  var USE_LIBJPEG = false;
 
@@ -35,9 +25,9 @@ diff --git a/src/settings.js b/src/settings.js
  // 1 = use libpng from emscripten-ports
  // [compile+link]
  var USE_LIBPNG = false;
-
 diff --git a/tools/ports/liblzma.py b/tools/ports/liblzma.py
 new file mode 100644
+index 0000000..6872a8b
 --- /dev/null
 +++ b/tools/ports/liblzma.py
 @@ -0,0 +1,151 @@
@@ -51,8 +41,8 @@ new file mode 100644
 +import logging
 +from pathlib import Path
 +
-+VERSION = '5.4.0'
-+HASH = '29b2cd25bb5b234b329ffe9547692d2c29be393db9d8d4ce70a66dfdaebd54433e79a89d80c57e58cd4559c3c68b9845507d5fedf3eec1c528a81e3d9ddbd811'
++VERSION = '5.4.2'
++HASH = '149f980338bea3d66de1ff5994b2b236ae1773135eda68b62b009df0c9dcdf5467f8cb2c06da95a71b6556d60bd3d21f475feced34d5dfdb80ee95416a2f9737'
 +
 +
 +def needed(settings):
@@ -192,3 +182,17 @@ new file mode 100644
 +#endif
 +#define VERSION "5.4.0"
 +'''
+diff --git a/tools/settings.py b/tools/settings.py
+index 10d6ca0..827e4a9 100644
+--- a/tools/settings.py
++++ b/tools/settings.py
+@@ -40,6 +40,7 @@ PORTS_SETTINGS = {
+     'USE_SDL_NET',
+     'USE_SDL_GFX',
+     'USE_LIBJPEG',
++    'USE_LIBLZMA',
+     'USE_OGG',
+     'USE_REGAL',
+     'USE_BOOST_HEADERS',
+--
+2.34.1