diff --git a/.github/workflows/build_recipes.yaml b/.github/workflows/build_recipes.yaml
index 4c008a4dc..8cb128fee 100644
--- a/.github/workflows/build_recipes.yaml
+++ b/.github/workflows/build_recipes.yaml
@@ -2,7 +2,7 @@ name: build recipes
 on:
   push:
     branches:
-      - 'main'
+      - 'emscripten-3.1.73'
     paths:
       - 'recipes/**'
   pull_request:
diff --git a/conda_build_config.yaml b/conda_build_config.yaml
index 3b5f1b773..3814d02e8 100644
--- a/conda_build_config.yaml
+++ b/conda_build_config.yaml
@@ -25,7 +25,7 @@ cxx_compiler:
 c_compiler_version:
   - if: emscripten
     then:
-      - 3.1.45
+      - 3.1.73
   - if: linux
     then:
       - 9
@@ -37,7 +37,7 @@ c_compiler_version:
 cxx_compiler_version:
   - if: emscripten
     then:
-      - 3.1.45
+      - 3.1.73
   - if: linux
     then:
       - 9
diff --git a/recipes/recipes/emscripten_emscripten-wasm32/patches/0001-Add-back-fs.findObject-and-fs.readFile-in-loadLibDat.patch b/recipes/recipes/emscripten_emscripten-wasm32/patches/0001-Add-back-fs.findObject-and-fs.readFile-in-loadLibDat.patch
index 5212949cd..7ec691b55 100644
--- a/recipes/recipes/emscripten_emscripten-wasm32/patches/0001-Add-back-fs.findObject-and-fs.readFile-in-loadLibDat.patch
+++ b/recipes/recipes/emscripten_emscripten-wasm32/patches/0001-Add-back-fs.findObject-and-fs.readFile-in-loadLibDat.patch
@@ -1,19 +1,8 @@
-From 0170462a78e86de9ee95017bfa7e4a3dd620a375 Mon Sep 17 00:00:00 2001
-From: Hood Chatham <roberthoodchatham@gmail.com>
-Date: Fri, 2 Jun 2023 11:59:32 -0700
-Subject: [PATCH] Add back fs.findObject and fs.readFile in loadLibData
-
-See upstream PR:
-https://github.com/emscripten-core/emscripten/pull/19513
----
- src/library_dylink.js | 13 +++++++++++--
- 1 file changed, 11 insertions(+), 2 deletions(-)
-
 diff --git a/src/library_dylink.js b/src/library_dylink.js
-index d7676cdc2..f616d230d 100644
+index 748468aae..c540877b3 100644
 --- a/src/library_dylink.js
 +++ b/src/library_dylink.js
-@@ -993,14 +993,23 @@ var LibraryDylink = {
+@@ -1013,15 +1013,23 @@ var LibraryDylink = {
  #endif
  
        // for wasm, we can use fetch for async, but for fs mode we can only imitate it
@@ -27,6 +16,7 @@ index d7676cdc2..f616d230d 100644
 +          libData = HEAP8.slice(data, data + dataSize);
          }
        }
+-
 +      if (!libData && flags.fs && flags.fs.findObject(libName)) {
 +        libData = flags.fs.readFile(libName, {encoding: 'binary'});
 +        if (!(libData instanceof Uint8Array)) {
@@ -36,9 +26,6 @@ index d7676cdc2..f616d230d 100644
 +      if (libData) {
 +        return flags.loadAsync ? Promise.resolve(libData) : libData;
 +      }
- 
        var libFile = locateFile(libName);
        if (flags.loadAsync) {
--- 
-2.25.1
-
+         return asyncLoad(libFile);
diff --git a/recipes/recipes/emscripten_emscripten-wasm32/patches/0001-Add-useful-error-when-symbol-resolution-fails.patch b/recipes/recipes/emscripten_emscripten-wasm32/patches/0001-Add-useful-error-when-symbol-resolution-fails.patch
deleted file mode 100644
index ec50727a1..000000000
--- a/recipes/recipes/emscripten_emscripten-wasm32/patches/0001-Add-useful-error-when-symbol-resolution-fails.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-From a8bdb50a29062ee70c8667e4fd94dde47917f8fa Mon Sep 17 00:00:00 2001
-From: Hood Chatham <roberthoodchatham@gmail.com>
-Date: Fri, 19 May 2023 12:19:00 -0700
-Subject: [PATCH] Add useful error when symbol resolution fails
-
-Currently if symbol resolution fails, we get:
-```js
-TypeError: Cannot read properties of undefined (reading 'apply')
-```
-It is very hard for newcomers to Emscripten to recognize this as a
-symbol resolution error. Even for people experienced with this message,
-it has the annoyance that it doesn't give any hint as to which symbol
-went missing.
-
-This adds a descriptive error message with the name of the missing
-symbol.
----
- src/library_dylink.js | 3 +++
- 1 file changed, 3 insertions(+)
-
-diff --git a/src/library_dylink.js b/src/library_dylink.js
-index d96e6b425..7f63b5c5e 100644
---- a/src/library_dylink.js
-+++ b/src/library_dylink.js
-@@ -727,6 +727,9 @@ var LibraryDylink = {
-             var resolved;
-             stubs[prop] = function() {
-               if (!resolved) resolved = resolveSymbol(prop);
-+              if (!resolved) {
-+                throw new Error(`Dynamic linking error: cannot resolve symbol ${prop}`);
-+              }
-               return resolved.apply(null, arguments);
-             };
-           }
--- 
-2.25.1
-
diff --git a/recipes/recipes/emscripten_emscripten-wasm32/recipe.yaml b/recipes/recipes/emscripten_emscripten-wasm32/recipe.yaml
index 2c6746e0e..e52a5cbef 100644
--- a/recipes/recipes/emscripten_emscripten-wasm32/recipe.yaml
+++ b/recipes/recipes/emscripten_emscripten-wasm32/recipe.yaml
@@ -1,9 +1,9 @@
 context:
   name: emscripten_emscripten-wasm32
-  version: 3.1.45
+  version: 3.1.73
 
 build:
-  number: 30
+  number: 0
 
 outputs:
   - package: