diff --git a/src/proto.rs b/src/proto.rs
index fdb8f2d..ab062d0 100644
--- a/src/proto.rs
+++ b/src/proto.rs
@@ -41,16 +41,20 @@ pub fn download_prebuilt(
         _ => unreachable!(),
     };
 
-    let os = env.os;
-
-    let prefix = match os {
-        HostOS::Linux => format!("zls-linux-{arch}-{version}"),
-        HostOS::MacOS => format!("zls-macos-{arch}-{version}"),
-        HostOS::Windows => format!("zls-windows-{arch}-{version}"),
+    let os = match env.os {
+        HostOS::Linux => "linux",
+        HostOS::MacOS => "macos",
+        HostOS::Windows => "windows",
         _ => unreachable!(),
     };
 
-    let filename = if os.is_windows() {
+    let prefix = if version >= VersionSpec::parse("0.15.0")? {
+        format!("zls-{arch}-{os}-{version}")
+    } else {
+        format!("zls-{os}-{arch}-{version}")
+    };
+
+    let filename = if env.os.is_windows() {
         format!("{prefix}.zip")
     } else {
         format!("{prefix}.tar.xz")
@@ -85,7 +89,7 @@ pub fn locate_executables(
 
 #[plugin_fn]
 pub fn load_versions(Json(_): Json<LoadVersionsInput>) -> FnResult<Json<LoadVersionsOutput>> {
-    let response: ZlsDist = fetch_json("https://releases.zigtools.org/v1/zls/index.json")?;
+    let response: ZlsDist = fetch_json("https://builds.zigtools.org/index.json")?;
     let versions = response.versions.keys().map(|t| t.to_owned()).collect();
     let output = LoadVersionsOutput::from(versions)?;
 
diff --git a/tests/download_test.rs b/tests/download_test.rs
index 92a9c33..4f2931b 100644
--- a/tests/download_test.rs
+++ b/tests/download_test.rs
@@ -1,6 +1,6 @@
 use proto_pdk_test_utils::*;
 
-generate_download_install_tests!("zls-test", "0.13.0");
+generate_download_install_tests!("zls-test", "0.16.0");
 
 // mod canary {
 //     use super::*;
@@ -21,22 +21,22 @@ async fn supports_linux_arm64() {
         plugin
             .download_prebuilt(DownloadPrebuiltInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
             })
             .await,
         DownloadPrebuiltOutput {
-            archive_prefix: Some("zls-linux-aarch64-0.13.0".into()),
+            archive_prefix: Some("zls-aarch64-linux-0.16.0".into()),
             checksum_url: Some(
-                "https://builds.zigtools.org/zls-linux-aarch64-0.13.0.tar.xz.minisig".into()
+                "https://builds.zigtools.org/zls-aarch64-linux-0.16.0.tar.xz.minisig".into()
             ),
             checksum_public_key: Some(
                 "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
             ),
-            download_name: Some("zls-linux-aarch64-0.13.0.tar.xz".into()),
-            download_url: "https://builds.zigtools.org/zls-linux-aarch64-0.13.0.tar.xz".into(),
+            download_name: Some("zls-aarch64-linux-0.16.0.tar.xz".into()),
+            download_url: "https://builds.zigtools.org/zls-aarch64-linux-0.16.0.tar.xz".into(),
             ..Default::default()
         }
     );
@@ -55,22 +55,22 @@ async fn supports_linux_x64() {
         plugin
             .download_prebuilt(DownloadPrebuiltInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
             })
             .await,
         DownloadPrebuiltOutput {
-            archive_prefix: Some("zls-linux-x86_64-0.13.0".into()),
+            archive_prefix: Some("zls-x86_64-linux-0.16.0".into()),
             checksum_url: Some(
-                "https://builds.zigtools.org/zls-linux-x86_64-0.13.0.tar.xz.minisig".into()
+                "https://builds.zigtools.org/zls-x86_64-linux-0.16.0.tar.xz.minisig".into()
             ),
             checksum_public_key: Some(
                 "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
             ),
-            download_name: Some("zls-linux-x86_64-0.13.0.tar.xz".into()),
-            download_url: "https://builds.zigtools.org/zls-linux-x86_64-0.13.0.tar.xz".into(),
+            download_name: Some("zls-x86_64-linux-0.16.0.tar.xz".into()),
+            download_url: "https://builds.zigtools.org/zls-x86_64-linux-0.16.0.tar.xz".into(),
             ..Default::default()
         }
     );
@@ -89,22 +89,22 @@ async fn supports_linux_x86() {
         plugin
             .download_prebuilt(DownloadPrebuiltInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
             })
             .await,
         DownloadPrebuiltOutput {
-            archive_prefix: Some("zls-linux-x86-0.13.0".into()),
+            archive_prefix: Some("zls-x86-linux-0.16.0".into()),
             checksum_url: Some(
-                "https://builds.zigtools.org/zls-linux-x86-0.13.0.tar.xz.minisig".into()
+                "https://builds.zigtools.org/zls-x86-linux-0.16.0.tar.xz.minisig".into()
             ),
             checksum_public_key: Some(
                 "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
             ),
-            download_name: Some("zls-linux-x86-0.13.0.tar.xz".into()),
-            download_url: "https://builds.zigtools.org/zls-linux-x86-0.13.0.tar.xz".into(),
+            download_name: Some("zls-x86-linux-0.16.0.tar.xz".into()),
+            download_url: "https://builds.zigtools.org/zls-x86-linux-0.16.0.tar.xz".into(),
             ..Default::default()
         }
     );
@@ -123,22 +123,22 @@ async fn supports_macos_arm64() {
         plugin
             .download_prebuilt(DownloadPrebuiltInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
             })
             .await,
         DownloadPrebuiltOutput {
-            archive_prefix: Some("zls-macos-aarch64-0.13.0".into()),
+            archive_prefix: Some("zls-aarch64-macos-0.16.0".into()),
             checksum_url: Some(
-                "https://builds.zigtools.org/zls-macos-aarch64-0.13.0.tar.xz.minisig".into()
+                "https://builds.zigtools.org/zls-aarch64-macos-0.16.0.tar.xz.minisig".into()
             ),
             checksum_public_key: Some(
                 "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
             ),
-            download_name: Some("zls-macos-aarch64-0.13.0.tar.xz".into()),
-            download_url: "https://builds.zigtools.org/zls-macos-aarch64-0.13.0.tar.xz".into(),
+            download_name: Some("zls-aarch64-macos-0.16.0.tar.xz".into()),
+            download_url: "https://builds.zigtools.org/zls-aarch64-macos-0.16.0.tar.xz".into(),
             ..Default::default()
         }
     );
@@ -157,22 +157,22 @@ async fn supports_macos_x64() {
         plugin
             .download_prebuilt(DownloadPrebuiltInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
             })
             .await,
         DownloadPrebuiltOutput {
-            archive_prefix: Some("zls-macos-x86_64-0.13.0".into()),
+            archive_prefix: Some("zls-x86_64-macos-0.16.0".into()),
             checksum_url: Some(
-                "https://builds.zigtools.org/zls-macos-x86_64-0.13.0.tar.xz.minisig".into()
+                "https://builds.zigtools.org/zls-x86_64-macos-0.16.0.tar.xz.minisig".into()
             ),
             checksum_public_key: Some(
                 "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
             ),
-            download_name: Some("zls-macos-x86_64-0.13.0.tar.xz".into()),
-            download_url: "https://builds.zigtools.org/zls-macos-x86_64-0.13.0.tar.xz".into(),
+            download_name: Some("zls-x86_64-macos-0.16.0.tar.xz".into()),
+            download_url: "https://builds.zigtools.org/zls-x86_64-macos-0.16.0.tar.xz".into(),
             ..Default::default()
         }
     );
@@ -191,22 +191,22 @@ async fn supports_windows_x64() {
         plugin
             .download_prebuilt(DownloadPrebuiltInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
             })
             .await,
         DownloadPrebuiltOutput {
-            archive_prefix: Some("zls-windows-x86_64-0.13.0".into()),
+            archive_prefix: Some("zls-x86_64-windows-0.16.0".into()),
             checksum_url: Some(
-                "https://builds.zigtools.org/zls-windows-x86_64-0.13.0.zip.minisig".into()
+                "https://builds.zigtools.org/zls-x86_64-windows-0.16.0.zip.minisig".into()
             ),
             checksum_public_key: Some(
                 "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
             ),
-            download_name: Some("zls-windows-x86_64-0.13.0.zip".into()),
-            download_url: "https://builds.zigtools.org/zls-windows-x86_64-0.13.0.zip".into(),
+            download_name: Some("zls-x86_64-windows-0.16.0.zip".into()),
+            download_url: "https://builds.zigtools.org/zls-x86_64-windows-0.16.0.zip".into(),
             ..Default::default()
         }
     );
@@ -225,22 +225,56 @@ async fn supports_windows_x86() {
         plugin
             .download_prebuilt(DownloadPrebuiltInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
             })
             .await,
         DownloadPrebuiltOutput {
-            archive_prefix: Some("zls-windows-x86-0.13.0".into()),
+            archive_prefix: Some("zls-x86-windows-0.16.0".into()),
             checksum_url: Some(
-                "https://builds.zigtools.org/zls-windows-x86-0.13.0.zip.minisig".into()
+                "https://builds.zigtools.org/zls-x86-windows-0.16.0.zip.minisig".into()
             ),
             checksum_public_key: Some(
                 "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
             ),
-            download_name: Some("zls-windows-x86-0.13.0.zip".into()),
-            download_url: "https://builds.zigtools.org/zls-windows-x86-0.13.0.zip".into(),
+            download_name: Some("zls-x86-windows-0.16.0.zip".into()),
+            download_url: "https://builds.zigtools.org/zls-x86-windows-0.16.0.zip".into(),
+            ..Default::default()
+        }
+    );
+}
+
+#[tokio::test(flavor = "multi_thread")]
+async fn supports_v0_14_0_and_below() {
+    let sandbox = create_empty_proto_sandbox();
+    let plugin = sandbox
+        .create_plugin_with_config("zls-test", |config| {
+            config.host(HostOS::Linux, HostArch::Arm64);
+        })
+        .await;
+
+    assert_eq!(
+        plugin
+            .download_prebuilt(DownloadPrebuiltInput {
+                context: ToolContext {
+                    version: VersionSpec::parse("0.14.0").unwrap(),
+                    ..Default::default()
+                },
+                ..Default::default()
+            })
+            .await,
+        DownloadPrebuiltOutput {
+            archive_prefix: Some("zls-linux-aarch64-0.14.0".into()),
+            checksum_url: Some(
+                "https://builds.zigtools.org/zls-linux-aarch64-0.14.0.tar.xz.minisig".into()
+            ),
+            checksum_public_key: Some(
+                "RWR+9B91GBZ0zOjh6Lr17+zKf5BoSuFvrx2xSeDE57uIYvnKBGmMjOex".into()
+            ),
+            download_name: Some("zls-linux-aarch64-0.14.0.tar.xz".into()),
+            download_url: "https://builds.zigtools.org/zls-linux-aarch64-0.14.0.tar.xz".into(),
             ..Default::default()
         }
     );
@@ -259,7 +293,7 @@ async fn locates_unix_bin() {
         plugin
             .locate_executables(LocateExecutablesInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
@@ -286,7 +320,7 @@ async fn locates_windows_bin() {
         plugin
             .locate_executables(LocateExecutablesInput {
                 context: ToolContext {
-                    version: VersionSpec::parse("0.13.0").unwrap(),
+                    version: VersionSpec::parse("0.16.0").unwrap(),
                     ..Default::default()
                 },
                 ..Default::default()
diff --git a/tests/versions_test.rs b/tests/versions_test.rs
index 04f5939..ed6cb02 100644
--- a/tests/versions_test.rs
+++ b/tests/versions_test.rs
@@ -1,9 +1,9 @@
 use proto_pdk_test_utils::*;
 
 generate_resolve_versions_tests!("zls-test", {
-    "0.13" => "0.13.0",
-    "0.13.0" => "0.13.0",
-    "0" => "0.14.0",
+    "0.16" => "0.16.0",
+    "0.16.0" => "0.16.0",
+    "0" => "0.16.0",
 });
 
 #[tokio::test(flavor = "multi_thread")]