diff --git a/.gitignore b/.gitignore
index 183f11d..52174da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /block-padding-0.1.5.crate
 /block-padding-0.2.0.crate
 /block-padding-0.2.1.crate
+/block-padding-0.3.1.crate
diff --git a/rust-block-padding.spec b/rust-block-padding.spec
index fb145ab..2b5fbcf 100644
--- a/rust-block-padding.spec
+++ b/rust-block-padding.spec
@@ -1,11 +1,11 @@
-# Generated by rust2rpm 15
+# Generated by rust2rpm 20
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate block-padding
 
 Name:           rust-%{crate}
-Version:        0.2.1
+Version:        0.3.1
 Release:        %autorelease
 Summary:        Padding and unpadding of messages divided into blocks
 
@@ -15,9 +15,6 @@ URL:            https://crates.io/crates/block-padding
 Source:         %{crates_source}
 
 ExclusiveArch:  %{rust_arches}
-%if %{__cargo_skip_build}
-BuildArch:      noarch
-%endif
 
 BuildRequires:  rust-packaging
 
@@ -32,11 +29,12 @@ BuildArch:      noarch
 
 %description    devel %{_description}
 
-This package contains library source intended for building other packages
-which use "%{crate}" crate.
+This package contains library source intended for building other packages which
+use the "%{crate}" crate.
 
 %files          devel
-%license LICENSE-MIT LICENSE-APACHE
+%license LICENSE-APACHE LICENSE-MIT
+%doc CHANGELOG.md
 %{cargo_registry}/%{crate}-%{version_no_tilde}/
 
 %package     -n %{name}+default-devel
@@ -45,12 +43,24 @@ BuildArch:      noarch
 
 %description -n %{name}+default-devel %{_description}
 
-This package contains library source intended for building other packages
-which use "default" feature of "%{crate}" crate.
+This package contains library source intended for building other packages which
+use the "default" feature of the "%{crate}" crate.
 
 %files       -n %{name}+default-devel
 %ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
 
+%package     -n %{name}+std-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+std-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "std" feature of the "%{crate}" crate.
+
+%files       -n %{name}+std-devel
+%ghost %{cargo_registry}/%{crate}-%{version_no_tilde}/Cargo.toml
+
 %prep
 %autosetup -n %{crate}-%{version_no_tilde} -p1
 %cargo_prep
diff --git a/sources b/sources
index a642121..f0dd6e7 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (block-padding-0.2.1.crate) = d0bad6ca76cd491446f17c00986aa8caab36a78b4ee4f881a14b316074a96940566ed90460aade765f2e7ce04b359cfe21f6c323200637f50e8b5adf567017af
+SHA512 (block-padding-0.3.1.crate) = 7b5f8757ad08854d67f5e1dec2597ee17cfa24d5d0735908ab4fdfe8b1b74616e7f305ffc8798a7354d684d78268c9c4317a784b4092343544d34384d3605a2b