diff --git a/.gitignore b/.gitignore
index 6b2496f..fe593fd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /async-compression-0.3.5.crate
 /async-compression-0.3.6.crate
 /async-compression-0.3.7.crate
+/async-compression-0.3.8.crate
diff --git a/async-compression-fix-metadata.diff b/async-compression-fix-metadata.diff
index 05627ce..a21f496 100644
--- a/async-compression-fix-metadata.diff
+++ b/async-compression-fix-metadata.diff
@@ -1,6 +1,15 @@
---- async-compression-0.3.7/Cargo.toml	1970-01-01T00:00:00+00:00
-+++ async-compression-0.3.7/Cargo.toml	2021-03-06T23:26:52.503834+00:00
-@@ -113,12 +113,6 @@
+--- async-compression-0.3.8/Cargo.toml	1970-01-01T00:00:00+00:00
++++ async-compression-0.3.8/Cargo.toml	2021-05-10T14:44:08.742346+00:00
+@@ -91,7 +91,7 @@
+ default-features = false
+ 
+ [dependencies.libzstd]
+-version = "0.7.0"
++version = "0.8.0"
+ optional = true
+ default-features = false
+ package = "zstd"
+@@ -113,18 +113,12 @@
  default-features = false
  package = "tokio"
  
@@ -13,7 +22,14 @@
  [dependencies.xz2]
  version = "0.1.6"
  optional = true
-@@ -166,12 +160,6 @@
+ 
+ [dependencies.zstd-safe]
+-version = "3.0.0"
++version = "4.0.0"
+ optional = true
+ default-features = false
+ [dev-dependencies.bytes]
+@@ -171,12 +165,6 @@
  default-features = false
  package = "tokio"
  
@@ -23,10 +39,10 @@
 -default-features = false
 -package = "tokio"
 -
- [dev-dependencies.tokio-util-04]
- version = "0.4.0"
- features = ["io"]
-@@ -187,7 +175,7 @@
+ [dev-dependencies.tokio-util-03]
+ version = "0.3.0"
+ features = ["codec"]
+@@ -204,7 +192,7 @@
  [features]
  all = ["all-implementations", "all-algorithms"]
  all-algorithms = ["brotli", "bzip2", "deflate", "gzip", "lzma", "xz", "zlib", "zstd"]
diff --git a/rust-async-compression.spec b/rust-async-compression.spec
index 029dc38..d4f6a19 100644
--- a/rust-async-compression.spec
+++ b/rust-async-compression.spec
@@ -1,4 +1,4 @@
-# Generated by rust2rpm 16
+# Generated by rust2rpm 17
 # * futures-test, ntest are not packaged
 %bcond_with check
 %global debug_package %{nil}
@@ -6,7 +6,7 @@
 %global crate async-compression
 
 Name:           rust-%{crate}
-Version:        0.3.7
+Version:        0.3.8
 Release:        1%{?dist}
 Summary:        Adaptors between compression crates and Rust's modern asynchronous IO types
 
@@ -15,7 +15,10 @@ License:        MIT or ASL 2.0
 URL:            https://crates.io/crates/async-compression
 Source:         %{crates_source}
 # Initial patched metadata
-# * drop tokio 0.3 support (we skipped 0.3 and went from 0.2 to 1.0 directly)
+# * drop tokio 0.3 support (Fedora only ships tokio 0.1, 0.2, and 1.0)
+# * bump zstd from 0.7 to 0.8
+# * bump zstd-safe from 3.0.1 to 4.0.0
+#   https://github.com/Nemo157/async-compression/pull/120
 Patch0:         async-compression-fix-metadata.diff
 
 ExclusiveArch:  %{rust_arches}
@@ -325,20 +328,24 @@ which use "zstd-safe" feature of "%{crate}" crate.
 %cargo_prep
 
 %generate_buildrequires
-%cargo_generate_buildrequires
+%cargo_generate_buildrequires -a
 
 %build
-%cargo_build
+%cargo_build -a
 
 %install
-%cargo_install
+%cargo_install -a
 
 %if %{with check}
 %check
-%cargo_test
+%cargo_test -a
 %endif
 
 %changelog
+* Mon May 10 2021 Fabio Valentini <decathorpe@gmail.com> - 0.3.8-1
+- Update to version 0.3.8.
+- Bump zstd to 0.8 and zstd-safe to 4.0.0.
+
 * Sat Mar 06 2021 Fabio Valentini <decathorpe@gmail.com> - 0.3.7-1
 - Update to version 0.3.7.
 
diff --git a/sources b/sources
index 7229f4e..6689817 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (async-compression-0.3.7.crate) = 234d9769e69be6406eb1d755b5a17d525dacc1e36ead6edb2a92a944c2936c4f0cb38e8219d605b84d933233a2cd2d825955fa87777f56ce537461614e50fa7a
+SHA512 (async-compression-0.3.8.crate) = 8ef6c186d3d5131034322540dedce6d8108bf1f00f9e73433772c06a77eb33567124f303a217f77f6daeb697f26fe9d6dd8ed6b9ae1e16ddb6e0f3053ab2bb06