diff --git a/Cargo.toml b/Cargo.toml
index 02e6c23c..c080d421 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ zmq_has = []
 [dependencies]
 bitflags = "1.0"
 libc = "0.2.15"
-zmq-sys = { version = "0.12.0", path = "zmq-sys" }
+zmq-sys = { version = "0.13.0", path = "zmq-sys" }
 
 [dev-dependencies]
 trybuild = { version = "1" }
diff --git a/zmq-sys/Cargo.toml b/zmq-sys/Cargo.toml
index 7cf03107..d0807ee4 100644
--- a/zmq-sys/Cargo.toml
+++ b/zmq-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zmq-sys"
-version = "0.12.0"
+version = "0.13.0"
 authors = [
     "a.rottmann@gmx.at",
     "erick.tryzelaar@gmail.com",
@@ -16,11 +16,11 @@ links = "zmq"
 [features]
 
 [dependencies]
-libc = "0.2.15"
+libc = "0.2.25"
 
 [build-dependencies]
 system-deps = "6"
-zeromq-src = "0.3"
+zeromq-src = "0.3.6+4.3.5"
 
 [package.metadata.system-deps]
-libzmq = "4.1"
+libzmq = "4.3.5"