diff --git a/.gitmodules b/.gitmodules
index ad5c36af..46641634 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,8 +1,8 @@
 [submodule "lmdb-master-sys/lmdb"]
 	path = lmdb-master-sys/lmdb
-	url = https://github.com/LMDB/lmdb
+	url = https://git.openldap.org/openldap/openldap
 	branch = mdb.master
 [submodule "lmdb-master3-sys/lmdb"]
 	path = lmdb-master3-sys/lmdb
-	url = https://github.com/LMDB/lmdb
+	url = https://git.openldap.org/openldap/openldap
 	branch = mdb.master3
diff --git a/lmdb-master-sys/build.rs b/lmdb-master-sys/build.rs
index 9bff3df5..af508f4a 100644
--- a/lmdb-master-sys/build.rs
+++ b/lmdb-master-sys/build.rs
@@ -112,6 +112,8 @@ fn main() {
     #[cfg(feature = "bindgen")]
     generate::generate();
 
+    println!("cargo::rerun-if-changed=lmdb");
+
     let mut lmdb = PathBuf::from(&env::var("CARGO_MANIFEST_DIR").unwrap());
     lmdb.push("lmdb");
     lmdb.push("libraries");
diff --git a/lmdb-master-sys/lmdb b/lmdb-master-sys/lmdb
index 9c9d3455..b21e1b9f 160000
--- a/lmdb-master-sys/lmdb
+++ b/lmdb-master-sys/lmdb
@@ -1 +1 @@
-Subproject commit 9c9d34558cc438f99aebd1ab58f83fd7faeabc0a
+Subproject commit b21e1b9fea935d2f3b94e6d315db1c47a5753199
diff --git a/lmdb-master3-sys/build.rs b/lmdb-master3-sys/build.rs
index 9bff3df5..af508f4a 100644
--- a/lmdb-master3-sys/build.rs
+++ b/lmdb-master3-sys/build.rs
@@ -112,6 +112,8 @@ fn main() {
     #[cfg(feature = "bindgen")]
     generate::generate();
 
+    println!("cargo::rerun-if-changed=lmdb");
+
     let mut lmdb = PathBuf::from(&env::var("CARGO_MANIFEST_DIR").unwrap());
     lmdb.push("lmdb");
     lmdb.push("libraries");
diff --git a/lmdb-master3-sys/lmdb b/lmdb-master3-sys/lmdb
index 1e7891c0..9ec98ca0 160000
--- a/lmdb-master3-sys/lmdb
+++ b/lmdb-master3-sys/lmdb
@@ -1 +1 @@
-Subproject commit 1e7891c016a4518eaf0aa29f959b0cc8a22d4111
+Subproject commit 9ec98ca00e8689de4fcd5400f2d5722cf14c56e8