diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 528ad204a7..9329990d22 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -40027,10 +40027,10 @@ (define-public rust-number-prefix-0.4
 giga, kibi.")
     (license license:expat)))
 
-(define-public rust-number-prefix-0.3
+(define-public rust-number-prefix-0.4
   (package
     (name "rust-number-prefix")
-    (version "0.3.0")
+    (version "0.4.0")
     (source
       (origin
         (method url-fetch)
@@ -40039,7 +40039,7 @@ (define-public rust-number-prefix-0.3
          (string-append name "-" version ".tar.gz"))
         (sha256
          (base32
-          "0slm4mqmpgs6hvz22ycny9lvyvl9ivs80a1lncslp7lszz02zc0p"))))
+          "1wvh13wvlajqxkb1filsfzbrnq0vrmrw298v2j3sy82z1rm282w3"))))
     (build-system cargo-build-system)
     (home-page "https://github.com/ogham/rust-number-prefix")
     (synopsis "Format numeric prefixes: kilo, giga, kibi")
@@ -40048,6 +40048,19 @@ (define-public rust-number-prefix-0.3
 giga, kibi.")
     (license license:expat)))
 
+(define-public rust-number-prefix-0.3
+  (package
+    (inherit rust-number-prefix-0.4)
+    (name "rust-number-prefix")
+    (version "0.3.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "number_prefix" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0slm4mqmpgs6hvz22ycny9lvyvl9ivs80a1lncslp7lszz02zc0p"))))))
+
 (define-public rust-numtoa-0.1
   (package
     (name "rust-numtoa")