diff --git a/build.gradle.kts b/build.gradle.kts
index 59f516f..28c0769 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -33,15 +33,15 @@ dependencies {
 
     // MCP Server (Ktor + MCP SDK)
     implementation("io.modelcontextprotocol:kotlin-sdk:0.5.0")
-    implementation("io.ktor:ktor-server-core:3.1.3")
-    implementation("io.ktor:ktor-server-netty:3.1.3")
-    implementation("io.ktor:ktor-server-cors:3.1.3")
-    implementation("io.ktor:ktor-server-sse:3.1.3")
-    implementation("io.ktor:ktor-server-content-negotiation:3.1.3")
-    implementation("io.ktor:ktor-serialization-kotlinx-json:3.1.3")
+    implementation("io.ktor:ktor-server-core:3.5.1")
+    implementation("io.ktor:ktor-server-netty:3.5.1")
+    implementation("io.ktor:ktor-server-cors:3.5.1")
+    implementation("io.ktor:ktor-server-sse:3.5.1")
+    implementation("io.ktor:ktor-server-content-negotiation:3.5.1")
+    implementation("io.ktor:ktor-serialization-kotlinx-json:3.5.1")
     // Phase 16: Ktor CLIENT modules (pin to 3.1.3 to match server-side Ktor family)
-    implementation("io.ktor:ktor-client-core:3.1.3")
-    implementation("io.ktor:ktor-client-cio:3.1.3")
+    implementation("io.ktor:ktor-client-core:3.5.1")
+    implementation("io.ktor:ktor-client-cio:3.5.1")
     // kotlin-logging: transitive via kotlin-sdk:0.5.0 StdioClientTransport; declared explicitly to pin version
     implementation("io.github.oshai:kotlin-logging-jvm:7.0.7")
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.8.1")