diff --git a/buildSrc/src/main/kotlin/otel.java-conventions.gradle.kts b/buildSrc/src/main/kotlin/otel.java-conventions.gradle.kts
index a1445ef80a3..5b011273ff4 100644
--- a/buildSrc/src/main/kotlin/otel.java-conventions.gradle.kts
+++ b/buildSrc/src/main/kotlin/otel.java-conventions.gradle.kts
@@ -24,6 +24,13 @@ base {
   }
 }
 
+// normalize timestamps and file ordering in jars, making the outputs reproducible
+// see open-telemetry/opentelemetry-java#4488
+tasks.withType<AbstractArchiveTask>().configureEach {
+  isPreserveFileTimestamps = false
+  isReproducibleFileOrder = true
+}
+
 java {
   toolchain {
     languageVersion.set(JavaLanguageVersion.of(17))