diff --git a/.gitignore b/.gitignore
index 047ff5b..e28ba76 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /memoffset-0.2.1.crate
 /memoffset-0.5.1.crate
 /memoffset-0.5.3.crate
+/memoffset-0.5.4.crate
diff --git a/rust-memoffset.spec b/rust-memoffset.spec
index f6e86d0..5befe45 100644
--- a/rust-memoffset.spec
+++ b/rust-memoffset.spec
@@ -1,12 +1,12 @@
-# Generated by rust2rpm 10
+# Generated by rust2rpm 13
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate memoffset
 
 Name:           rust-%{crate}
-Version:        0.5.3
-Release:        2%{?dist}
+Version:        0.5.4
+Release:        1%{?dist}
 Summary:        Offset_of functionality for Rust structs
 
 # Upstream license specification: MIT
@@ -38,7 +38,7 @@ which use "%{crate}" crate.
 %files          devel
 %license LICENSE
 %doc README.md
-%{cargo_registry}/%{crate}-%{version}/
+%{cargo_registry}/%{crate}-%{version_no_tilde}/
 
 %package     -n %{name}+default-devel
 Summary:        %{summary}
@@ -50,7 +50,19 @@ This package contains library source intended for building other packages
 which use "default" feature of "%{crate}" crate.
 
 %files       -n %{name}+default-devel
-%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
+%package     -n %{name}+unstable_const-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+unstable_const-devel %{_description}
+
+This package contains library source intended for building other packages
+which use "unstable_const" feature of "%{crate}" crate.
+
+%files       -n %{name}+unstable_const-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
 %prep
 %autosetup -n %{crate}-%{version_no_tilde} -p1
@@ -71,6 +83,9 @@ which use "default" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Tue Mar 17 16:46:04 CET 2020 Igor Raits <ignatenkobrain@fedoraproject.org> - 0.5.4-1
+- Update to 0.5.4
+
 * Thu Jan 30 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.5.3-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild
 
diff --git a/sources b/sources
index 9b0d0d0..36cdf99 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (memoffset-0.5.3.crate) = a647140f4218bae56c48119a21c96edefb214a10329bdb91f16382e2b85854dffae33c6c3d55bbad3dd7c82424f0a10e5d97a9010ccfe84b7339bc5f16c4786c
+SHA512 (memoffset-0.5.4.crate) = 5f8f6a0f12af165a98e6401a694ae35fe5ed21865d6f25d95b64c363304841ef05ad0800dc841477fbf85080975d49a5a182964d6240c182b9d55ef3b5877a49