diff --git a/Cargo.lock b/Cargo.lock
index dd7d828da..f78c7084b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1747,8 +1747,8 @@ checksum = "2540771e65fc8cb83cd6e8a237f70c319bd5c29f78ed1084ba5d50eeac86f7f9"
 
 [[package]]
 name = "heed"
-version = "0.12.4"
-source = "git+https://github.com/meilisearch/heed?tag=v0.12.4#7a4542bc72dd60ef0f508c89900ea292218223fb"
+version = "0.12.5"
+source = "git+https://github.com/meilisearch/heed?tag=v0.12.5#4158a6c484752afaaf9e2530a6ee0e7ab0f24ee8"
 dependencies = [
  "byteorder",
  "heed-traits",
@@ -1765,12 +1765,12 @@ dependencies = [
 [[package]]
 name = "heed-traits"
 version = "0.7.0"
-source = "git+https://github.com/meilisearch/heed?tag=v0.12.4#7a4542bc72dd60ef0f508c89900ea292218223fb"
+source = "git+https://github.com/meilisearch/heed?tag=v0.12.5#4158a6c484752afaaf9e2530a6ee0e7ab0f24ee8"
 
 [[package]]
 name = "heed-types"
 version = "0.7.2"
-source = "git+https://github.com/meilisearch/heed?tag=v0.12.4#7a4542bc72dd60ef0f508c89900ea292218223fb"
+source = "git+https://github.com/meilisearch/heed?tag=v0.12.5#4158a6c484752afaaf9e2530a6ee0e7ab0f24ee8"
 dependencies = [
  "bincode",
  "heed-traits",
diff --git a/milli/Cargo.toml b/milli/Cargo.toml
index b32592ab9..0ba44a819 100644
--- a/milli/Cargo.toml
+++ b/milli/Cargo.toml
@@ -19,7 +19,7 @@ fst = "0.4.7"
 fxhash = "0.2.1"
 geoutils = "0.5.1"
 grenad = { version = "0.4.3", default-features = false, features = ["tempfile"] }
-heed = { git = "https://github.com/meilisearch/heed", tag = "v0.12.4", default-features = false, features = ["lmdb", "sync-read-txn"] }
+heed = { git = "https://github.com/meilisearch/heed", tag = "v0.12.5", default-features = false, features = ["lmdb", "sync-read-txn"] }
 json-depth-checker = { path = "../json-depth-checker" }
 levenshtein_automata = { version = "0.2.1", features = ["fst_automaton"] }
 memmap2 = "0.5.7"
@@ -63,6 +63,10 @@ fuzzcheck = "0.12.1"
 [features]
 default = [ "charabia/default" ]
 
+# Use POSIX semaphores instead of SysV semaphores in LMDB
+# For more information on this feature, see heed's Cargo.toml
+lmdb-posix-sem = ["heed/posix-sem"]
+
 # allow chinese specialized tokenization
 chinese = ["charabia/chinese"]