diff --git a/packages/opencode/src/lsp/client.ts b/packages/opencode/src/lsp/client.ts
index 809ea95091b6..528f7aa2e00e 100644
--- a/packages/opencode/src/lsp/client.ts
+++ b/packages/opencode/src/lsp/client.ts
@@ -276,7 +276,7 @@ export async function create(input: { serverID: string; server: LSPServer.Handle
         },
       },
     }),
-    INITIALIZE_TIMEOUT_MS,
+    input.server.initializeTimeout ?? INITIALIZE_TIMEOUT_MS,
   ).catch((err) => {
     logger.error("initialize error", { error: err })
     throw new InitializeError(
diff --git a/packages/opencode/src/lsp/server.ts b/packages/opencode/src/lsp/server.ts
index b8861d1f8167..b87c5adc4a52 100644
--- a/packages/opencode/src/lsp/server.ts
+++ b/packages/opencode/src/lsp/server.ts
@@ -27,6 +27,8 @@ const output = (cmd: string[], opts: Process.RunOptions = {}) => Process.text(cm
 export interface Handle {
   process: ChildProcessWithoutNullStreams
   initialization?: Record<string, any>
+  /** Override the default 45 s initialize-request timeout (ms). */
+  initializeTimeout?: number
 }
 
 type RootFunction = (file: string, ctx: InstanceContext) => Promise<string | undefined>
@@ -1290,6 +1292,7 @@ export const JDTLS: Info = {
           cwd: root,
         },
       ),
+      initializeTimeout: 180_000,
     }
   },
 }
@@ -1389,6 +1392,7 @@ export const KotlinLS: Info = {
       process: spawn(launcherScript, ["--stdio"], {
         cwd: root,
       }),
+      initializeTimeout: 180_000,
     }
   },
 }