diff --git a/divviup/build.gradle.kts b/divviup/build.gradle.kts
index 7bf1114..ee8a84d 100644
--- a/divviup/build.gradle.kts
+++ b/divviup/build.gradle.kts
@@ -52,8 +52,8 @@ android {
 val documentation: Configuration by configurations.creating
 
 dependencies {
-    implementation("com.squareup.okhttp3:okhttp:5.3.2")
-    documentation("com.squareup.okhttp3:okhttp:5.3.2") {
+    implementation("com.squareup.okhttp3:okhttp:5.4.0")
+    documentation("com.squareup.okhttp3:okhttp:5.4.0") {
         attributes {
             attribute(
                 TargetJvmEnvironment.TARGET_JVM_ENVIRONMENT_ATTRIBUTE,
@@ -63,8 +63,8 @@ dependencies {
     }
     testImplementation(project(":divviup:commontest"))
     testImplementation("junit:junit:4.13.2")
-    testImplementation("com.squareup.okhttp3:mockwebserver3:5.3.2")
-    testImplementation("com.squareup.okhttp3:mockwebserver3-junit4:5.3.2")
+    testImplementation("com.squareup.okhttp3:mockwebserver3:5.4.0")
+    testImplementation("com.squareup.okhttp3:mockwebserver3-junit4:5.4.0")
     testImplementation("org.testcontainers:testcontainers:2.0.5")
     testImplementation("com.fasterxml.jackson.core:jackson-databind:2.22.0")
     testImplementation("ch.qos.logback:logback-core:1.5.37")
@@ -74,8 +74,8 @@ dependencies {
     androidTestImplementation(project(":divviup:commontest"))
     androidTestImplementation("androidx.test.ext:junit:1.3.0")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.7.0")
-    androidTestImplementation("com.squareup.okhttp3:mockwebserver3:5.3.2")
-    androidTestImplementation("com.squareup.okhttp3:mockwebserver3-junit4:5.3.2")
+    androidTestImplementation("com.squareup.okhttp3:mockwebserver3:5.4.0")
+    androidTestImplementation("com.squareup.okhttp3:mockwebserver3-junit4:5.4.0")
 }
 
 val rustTargets: List<String> by rootProject.extra
diff --git a/divviup/commontest/build.gradle.kts b/divviup/commontest/build.gradle.kts
index 203e06f..8e732a0 100644
--- a/divviup/commontest/build.gradle.kts
+++ b/divviup/commontest/build.gradle.kts
@@ -29,6 +29,6 @@ android {
 }
 
 dependencies {
-    implementation("com.squareup.okhttp3:mockwebserver3:5.3.2")
-    implementation("com.squareup.okhttp3:mockwebserver3-junit4:5.3.2")
+    implementation("com.squareup.okhttp3:mockwebserver3:5.4.0")
+    implementation("com.squareup.okhttp3:mockwebserver3-junit4:5.4.0")
 }