diff --git a/disk-buffering/build.gradle.kts b/disk-buffering/build.gradle.kts
index c434dbad5..c0011b976 100644
--- a/disk-buffering/build.gradle.kts
+++ b/disk-buffering/build.gradle.kts
@@ -20,7 +20,7 @@ dependencies {
   api("io.opentelemetry:opentelemetry-sdk")
   compileOnly("com.google.auto.value:auto-value-annotations")
   annotationProcessor("com.google.auto.value:auto-value")
-  signature("com.toasttab.android:gummy-bears-api-24:0.6.1@signature")
+  signature("com.toasttab.android:gummy-bears-api-21:0.6.1:coreLib@signature")
   testImplementation("org.mockito:mockito-inline")
   testImplementation("io.opentelemetry:opentelemetry-sdk-testing")
 }