diff --git a/lab-fix-metadata.diff b/lab-fix-metadata.diff
new file mode 100644
index 0000000..3f50c25
--- /dev/null
+++ b/lab-fix-metadata.diff
@@ -0,0 +1,11 @@
+--- lab-0.8.1/Cargo.toml	2020-08-14T06:54:54+00:00
++++ lab-0.8.1/Cargo.toml	2021-06-28T13:40:03.499389+00:00
+@@ -35,7 +35,7 @@
+ name = "lab_to_rgb"
+ harness = false
+ [dev-dependencies.approx]
+-version = "0.3"
++version = "0.5"
+ 
+ [dev-dependencies.criterion]
+ version = "0.3"
diff --git a/rust-lab.spec b/rust-lab.spec
index 99eddc6..0a8943d 100644
--- a/rust-lab.spec
+++ b/rust-lab.spec
@@ -1,4 +1,4 @@
-# Generated by rust2rpm 10
+# Generated by rust2rpm 17
 %bcond_without check
 %global debug_package %{nil}
 
@@ -6,7 +6,7 @@
 
 Name:           rust-%{crate}
 Version:        0.8.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Tools for converting RGB colors to the CIE-L*a*b* color space
 
 # Upstream license specification: MIT
@@ -14,6 +14,9 @@ Summary:        Tools for converting RGB colors to the CIE-L*a*b* color space
 License:        MIT
 URL:            https://crates.io/crates/lab
 Source:         %{crates_source}
+# Initial patched metadata
+# * bump approx from 0.3 to 0.5
+Patch0:         lab-fix-metadata.diff
 
 ExclusiveArch:  %{rust_arches}
 %if %{__cargo_skip_build}
@@ -38,7 +41,7 @@ This package contains library source intended for building other packages
 which use "%{crate}" crate.
 
 %files          devel
-%{cargo_registry}/%{crate}-%{version}/
+%{cargo_registry}/%{crate}-%{version_no_tilde}/
 
 %package     -n %{name}+default-devel
 Summary:        %{summary}
@@ -71,6 +74,9 @@ which use "default" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Mon Jun 28 2021 Fabio Valentini <decathorpe@gmail.com> - 0.8.1-3
+- Bump approx from 0.3 to 0.5.
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.8.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild