diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index baba7cc364..e6e02d277e 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -71298,6 +71298,29 @@ Read/Write streams as well as low-level in-memory encoding and decoding.")
 library.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-yasna-0.4
+  (package
+    (name "rust-yasna")
+    (version "0.4.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "yasna" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32 "0xgsvxqnycdakh6j3hg4dk3mylrpnba50w0d36vg5k311sfs4qp2"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-bit-vec" ,rust-bit-vec-0.6)
+        ("rust-chrono" ,rust-chrono-0.4)
+        ("rust-num-bigint" ,rust-num-bigint-0.4))
+       #:cargo-development-inputs
+       (("rust-num-traits" ,rust-num-traits-0.2))))
+    (home-page "https://github.com/qnighy/yasna.rs")
+    (synopsis "ASN.1 library for Rust")
+    (description "ASN.1 library for Rust")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-yeslogic-fontconfig-sys-3
   (package
     (name "rust-yeslogic-fontconfig-sys")