diff --git a/.gitignore b/.gitignore
index fa6e32e..49627b9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /parking_lot_core-0.3.0.crate
 /parking_lot_core-0.3.1.crate
+/parking_lot_core-0.4.0.crate
diff --git a/parking_lot_core-fix-metadata.diff b/parking_lot_core-fix-metadata.diff
index 76743b1..1d6ef88 100644
--- a/parking_lot_core-fix-metadata.diff
+++ b/parking_lot_core-fix-metadata.diff
@@ -1,5 +1,5 @@
---- parking_lot_core-0.3.1/Cargo.toml	1970-01-01T01:00:00+01:00
-+++ parking_lot_core-0.3.1/Cargo.toml	2018-10-28T00:31:57.385657+02:00
+--- parking_lot_core-0.4.0/Cargo.toml	1970-01-01T01:00:00+01:00
++++ parking_lot_core-0.4.0/Cargo.toml	2018-12-15T10:00:00.362103+01:00
 @@ -19,31 +19,15 @@
  categories = ["concurrency"]
  license = "Apache-2.0/MIT"
@@ -13,7 +13,7 @@
 -optional = true
 -
  [dependencies.rand]
- version = "0.5"
+ version = "0.6"
  
  [dependencies.smallvec]
  version = "0.6"
diff --git a/rust-parking_lot_core.spec b/rust-parking_lot_core.spec
index 62f012c..1ad2899 100644
--- a/rust-parking_lot_core.spec
+++ b/rust-parking_lot_core.spec
@@ -6,8 +6,8 @@
 %global crate parking_lot_core
 
 Name:           rust-%{crate}
-Version:        0.3.1
-Release:        3%{?dist}
+Version:        0.4.0
+Release:        1%{?dist}
 Summary:        Advanced API for creating custom synchronization primitives
 
 # Upstream license specification: Apache-2.0/MIT
@@ -24,7 +24,7 @@ ExclusiveArch:  %{rust_arches}
 
 BuildRequires:  rust-packaging
 BuildRequires:  (crate(libc/default) >= 0.2.27 with crate(libc/default) < 0.3.0)
-BuildRequires:  (crate(rand/default) >= 0.5.0 with crate(rand/default) < 0.6.0)
+BuildRequires:  (crate(rand/default) >= 0.6.0 with crate(rand/default) < 0.7.0)
 BuildRequires:  (crate(rustc_version/default) >= 0.2.0 with crate(rustc_version/default) < 0.3.0)
 BuildRequires:  (crate(smallvec/default) >= 0.6.0 with crate(smallvec/default) < 0.7.0)
 
@@ -74,6 +74,9 @@ which use "default" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Sat Dec 15 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.4.0-1
+- Update to 0.4.0
+
 * Sat Oct 27 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.3.1-3
 - Adapt to new packaging
 
diff --git a/sources b/sources
index d53f6c8..a4c8e78 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (parking_lot_core-0.3.1.crate) = 3cca0091e839cb0b63dd17f989c1d3d196e9706b4adb227f9308cd2b43b68806dfdf0b7ea098592cdc520bff249ddcadf23d0c0a7c23eda179ac11594c26e127
+SHA512 (parking_lot_core-0.4.0.crate) = 25c0389e9d3d88725398fb304d3a4c20a3da0bf0d67f12c7cdca38f8068dc6ea7b57341579136cf4792cbb92fd64dd33cd91412463f4df8902e1b8c87ca08d08