diff --git a/Cargo.lock b/Cargo.lock
index a3c95d5..14da9b1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1352,8 +1352,7 @@ checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
 [[package]]
 name = "libmimalloc-sys"
 version = "0.1.49"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a45a52f43e1c16f667ccfe4dd8c85b7f7c204fd5e3bf46c5b0db9a5c3c0b8e9"
+source = "git+https://github.com/xonatius/mimalloc_rust.git?rev=6d4c41bb10c6d9da1d1b6f07b38c4cc051667f11#6d4c41bb10c6d9da1d1b6f07b38c4cc051667f11"
 dependencies = [
  "cc",
 ]
@@ -1476,8 +1475,7 @@ checksum = "cf8baf1c55e62ffcace7a9f06f4bd9cd3f0c4beb022d3b367256b91b87513d98"
 [[package]]
 name = "mimalloc"
 version = "0.1.52"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d4139bb28d14ad1facf21d5eb8825051b326e172d216b39f6d31df53cc97862"
+source = "git+https://github.com/xonatius/mimalloc_rust.git?rev=6d4c41bb10c6d9da1d1b6f07b38c4cc051667f11#6d4c41bb10c6d9da1d1b6f07b38c4cc051667f11"
 dependencies = [
  "libmimalloc-sys",
 ]
@@ -2932,7 +2930,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32497e9a4c7b38532efcdebeef879707aa9f794296a4f0244f6f69e9bc8574bd"
 dependencies = [
  "fastrand",
- "getrandom 0.4.3",
+ "getrandom 0.3.4",
  "once_cell",
  "rustix",
  "windows-sys",
diff --git a/Cargo.toml b/Cargo.toml
index acbc902..2bd87bc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,12 +17,13 @@ name = "prosody"
 [dependencies]
 chrono = "0.4"
 futures = "0.3"
-mimalloc = { version = "0.1", features = ["local_dynamic_tls"] }
+# TODO: Use a crates.io release after it includes the fix for https://github.com/microsoft/mimalloc/issues/1287.
+mimalloc = { git = "https://github.com/xonatius/mimalloc_rust.git", rev = "6d4c41bb10c6d9da1d1b6f07b38c4cc051667f11", features = [
+    "local_dynamic_tls",
+] }
 opentelemetry = "0.32"
 parking_lot = "0.12"
-prosody = { version = "0.6.0", features = [
-    "libz-static",
-] }
+prosody = { version = "0.6.0", features = ["libz-static"] }
 pyo3 = { version = "0.29", features = ["chrono"] }
 pyo3-async-runtimes = { version = "0.29", features = ["tokio-runtime"] }
 pythonize = "0.29"