diff --git a/src/hexdocs/config.gleam b/src/hexdocs/config.gleam
index 1a52e65..177048c 100644
--- a/src/hexdocs/config.gleam
+++ b/src/hexdocs/config.gleam
@@ -17,6 +17,15 @@ pub fn hexdocs_package_url(package: String) -> String {
   "https://" <> hexdocs_package_host(package)
 }
 
+/// Documentation URL for a package at a specific version. When the version is
+/// empty the version segment is omitted, linking to the latest documentation.
+pub fn hexdocs_package_version_url(package: String, version: String) -> String {
+  case version {
+    "" -> hexdocs_package_url(package)
+    _ -> hexdocs_package_url(package) <> "/" <> version
+  }
+}
+
 pub fn hexpm_url() -> String {
   "https://hex.pm"
 }
diff --git a/src/hexdocs/view/search.gleam b/src/hexdocs/view/search.gleam
index b1c9c4c..b8f869a 100644
--- a/src/hexdocs/view/search.gleam
+++ b/src/hexdocs/view/search.gleam
@@ -245,10 +245,10 @@ pub fn search(model: Model) {
                             case filter.status {
                               version.Found(ver) ->
                                 attribute.href(
-                                  config.hexdocs_package_url(filter.name)
-                                  <> "/"
-                                  <> ver
-                                  <> "/",
+                                  config.hexdocs_package_version_url(
+                                    filter.name,
+                                    ver,
+                                  ),
                                 )
                               _ -> class("")
                             },
diff --git a/test/hexdocs_test.gleam b/test/hexdocs_test.gleam
index 3831e7a..be69118 100644
--- a/test/hexdocs_test.gleam
+++ b/test/hexdocs_test.gleam
@@ -1,12 +1,22 @@
 import gleeunit
 import gleeunit/should
+import hexdocs/config
 
 pub fn main() {
   gleeunit.main()
 }
 
-// gleeunit test functions end in `_test`
-pub fn hello_world_test() {
-  1
-  |> should.equal(1)
+pub fn hexdocs_package_version_url_with_version_test() {
+  config.hexdocs_package_version_url("phoenix", "1.7.0")
+  |> should.equal("https://phoenix.hexdocs.pm/1.7.0")
+}
+
+pub fn hexdocs_package_version_url_without_version_test() {
+  config.hexdocs_package_version_url("mix", "")
+  |> should.equal("https://mix.hexdocs.pm")
+}
+
+pub fn hexdocs_package_version_url_replaces_underscores_test() {
+  config.hexdocs_package_version_url("ex_unit", "")
+  |> should.equal("https://ex-unit.hexdocs.pm")
 }