diff --git a/releases.json b/releases.json
index d6c262c7e..635bdf6ac 100644
--- a/releases.json
+++ b/releases.json
@@ -3234,6 +3234,7 @@
       "mimalloc"
     ],
     "versions": [
+      "3.5.3-1",
       "3.5.1-1",
       "3.3.2-1",
       "3.2.7-1",
diff --git a/subprojects/mimalloc.wrap b/subprojects/mimalloc.wrap
index f37d3b8ec..cead41065 100644
--- a/subprojects/mimalloc.wrap
+++ b/subprojects/mimalloc.wrap
@@ -1,8 +1,8 @@
 [wrap-file]
-directory = mimalloc-3.5.1
-source_url = https://github.com/microsoft/mimalloc/archive/refs/tags/v3.5.1.tar.gz
-source_filename = mimalloc-3.5.1.tar.gz
-source_hash = 2602daad9b64b213a8835dee6fadda96d2081c0171bfcd3fb2db39bdc669d6b3
+directory = mimalloc-3.5.3
+source_url = https://github.com/microsoft/mimalloc/archive/refs/tags/v3.5.3.tar.gz
+source_filename = mimalloc-3.5.3.tar.gz
+source_hash = 3b4a15153a59905995f7070296ed604bb5ccc00cabb8b93446931aff77224d47
 patch_directory = mimalloc
 
 [provide]
diff --git a/subprojects/packagefiles/mimalloc/meson.build b/subprojects/packagefiles/mimalloc/meson.build
index 7f3750d51..d80578d71 100644
--- a/subprojects/packagefiles/mimalloc/meson.build
+++ b/subprojects/packagefiles/mimalloc/meson.build
@@ -3,7 +3,7 @@ project(
   'c',
   meson_version: '>=0.56.0',
   license: 'MIT',
-  version: '3.5.1',
+  version: '3.5.3',
 )
 
 mi_sources = []
@@ -28,6 +28,8 @@ mi_sources += files(
   'src/page-map.c',
   'src/page.c',
   'src/random.c',
+  'src/sample-guarded.c',
+  'src/sample-profile.c',
   'src/stats.c',
   'src/subproc.c',
   'src/theap.c',