diff --git a/.gitignore b/.gitignore
index 5d09fd8..175642a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 /libmimalloc-sys-0.1.35.crate
 /libmimalloc-sys-0.1.38.crate
 /libmimalloc-sys-0.1.39.crate
+/libmimalloc-sys-0.1.42.crate
diff --git a/get-bundled-mimalloc-ver.sh b/get-bundled-mimalloc-ver.sh
new file mode 100755
index 0000000..d9ba3f5
--- /dev/null
+++ b/get-bundled-mimalloc-ver.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+grep "define MI_MALLOC_VERSION" libmimalloc-sys-*/c_src/mimalloc/include/mimalloc.h | cut -d' ' -f3 | fold -w1 | paste -sd.
diff --git a/rust-libmimalloc-sys.spec b/rust-libmimalloc-sys.spec
index 9d1d494..165063e 100644
--- a/rust-libmimalloc-sys.spec
+++ b/rust-libmimalloc-sys.spec
@@ -1,11 +1,11 @@
-# Generated by rust2rpm 26
-%bcond_without check
+# Generated by rust2rpm 27
+%bcond check 1
 %global debug_package %{nil}
 
 %global crate libmimalloc-sys
 
 Name:           rust-libmimalloc-sys
-Version:        0.1.39
+Version:        0.1.42
 Release:        %autorelease
 Summary:        Sys crate wrapping the mimalloc allocator
 
@@ -18,8 +18,8 @@ BuildRequires:  cargo-rpm-macros >= 24
 # TODO: get this to build against system mimalloc
 # or ask mimalloc dev to switch to mimalloc-sys
 # https://github.com/purpleprotocol/mimalloc_rust/issues/73
-# see MI_MALLOC_VERSION in mimalloc/include/mimalloc.h
-Provides:       bundled(mimalloc) = 2.1.7
+# use get-bundled-mimalloc-ver.sh after unpacking the crate
+Provides:       bundled(mimalloc) = 2.2.3
 
 %global _description %{expand:
 Sys crate wrapping the mimalloc allocator.}
diff --git a/sources b/sources
index f240a9c..57535ff 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (libmimalloc-sys-0.1.39.crate) = db578da8722b82eafac3b587b2db24cbf95fbd85a25b7ce30286deb9eda6820b5d452ece7c3126a2d8c96400941dc3946b4cb2f46172241861405aa09a3a2451
+SHA512 (libmimalloc-sys-0.1.42.crate) = 0daf3ef819820d7d0ba7d189038ad33ce7fbec370edb5f2d07b47569d359f0364e8b43639743e0a800ca41bf432f043ca71bc9dbf900705732b856e147ec6d85