diff --git a/CHANGELOG.md b/CHANGELOG.md
index a8c494a8d..985b0cdd2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [v0.0.6] - TBD
 
-Uses libvips v8.14.5, compiled with Emscripten v3.1.47.
+Uses libvips v8.14.5, compiled with Emscripten v3.1.48.
 
 ## [v0.0.5] - 2023-04-27
 
diff --git a/Dockerfile b/Dockerfile
index 7b91a78bd..9598c650f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # https://github.com/emscripten-core/emsdk
-FROM docker.io/emscripten/emsdk:3.1.47
+FROM docker.io/emscripten/emsdk:3.1.48
 
 # Path settings
 ENV \
@@ -25,7 +25,7 @@ RUN \
 
 # Emscripten patches
 RUN \
-  curl -Ls https://github.com/emscripten-core/emscripten/compare/3.1.47...kleisauke:wasm-vips-3.1.47.patch | patch -p1 -d $EMSDK/upstream/emscripten && \
+  curl -Ls https://github.com/emscripten-core/emscripten/compare/3.1.48...kleisauke:wasm-vips-3.1.48.patch | patch -p1 -d $EMSDK/upstream/emscripten && \
   emcc --clear-cache && embuilder build sysroot --force
 
 # Rust
diff --git a/build.sh b/build.sh
index f6ccffcce..411ed525d 100755
--- a/build.sh
+++ b/build.sh
@@ -498,11 +498,6 @@ node --version
   # Building for both Node.js and web, prepare NPM package
   stage "Prepare NPM package"
 
-  # Ensure compatibility with Deno (classic workers are not supported)
-  # TODO(kleisauke): Remove when Emscripten 3.1.48 is released - https://github.com/emscripten-core/emscripten/pull/20452
-  sed -i 's/new Worker(\([^()]\+\))/new Worker(\1,{type:"module"})/g' $SOURCE_DIR/lib/vips-es6.js
-  sed -i 's/new Worker(\(new URL([^)]\+)\)/new Worker(\1,{type:"module"}/g' $SOURCE_DIR/lib/vips-es6.js
-
   # The produced binary should be the same across the different variants (sanity check)
   expected_sha256=$(sha256sum "$SOURCE_DIR/lib/vips.wasm" | awk '{ print $1 }')
   for file in vips-es6.wasm vips-node.wasm vips-node-es6.wasm; do
@@ -527,13 +522,9 @@ node --version
   sed -i 's/var Module/const require = createRequire(import.meta.url);&/' $SOURCE_DIR/lib/vips-node.worker.mjs
 
   # Print the target features section
-  PYTHONPATH="$(dirname $(which emcc))" python3 - << EOF
-from tools import webassembly
-
-with webassembly.Module('$SOURCE_DIR/lib/vips.wasm') as m:
-  features = [f[1] for f in m.parse_features_section() if f[0] == '+']
-  print('Used Wasm features:', ' '.join(features))
-EOF
+  echo -n "Used Wasm features: "
+  $EMSDK/upstream/bin/wasm-opt --mvp-features --print-features -o /dev/null $SOURCE_DIR/lib/vips.wasm | \
+    sed 's/^--enable-//' | paste -sd' '
 
   # Copy dynamic loadable modules
   module_dir=$(printf '%s\n' $TARGET/lib/vips-modules-* | sort -n | tail -1)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 975f4c10a..3ff7f8959 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -135,6 +135,7 @@ set(MAIN_LINK_OPTIONS
         -sFORCE_FILESYSTEM
         -sEXPORTED_RUNTIME_METHODS=FS,ENV,deletionQueue,addFunction,bigintToI53Checked
         -sEXCEPTION_STACK_TRACES
+        -sBINARYEN_EXTRA_PASSES=--emit-target-features
         )
 
 set_target_properties(${TARGETS}