diff --git a/.brazil.json b/.brazil.json
index e00a9989..0a4b9769 100644
--- a/.brazil.json
+++ b/.brazil.json
@@ -1,8 +1,8 @@
 {
   "dependencies": {
     "org.jetbrains.kotlin:kotlin-stdlib:2.0.*": "KotlinStdlib-2.x",
-    "org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.8.*": "KotlinxCoroutinesCoreJvm-1.8.x",
-    "org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.8.*": "KotlinxCoroutinesJdk8-1.8.x",
+    "org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.*": "KotlinxCoroutinesCoreJvm-1.x",
+    "org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.*": "KotlinxCoroutinesJdk8-1.x",
     "software.amazon.awssdk.crt:aws-crt:0.*": "Aws-crt-java-1.0.x"
   },
   "packageHandlingRules": {
diff --git a/.changes/bc0b11a8-48ce-4bc0-8b3f-4ee858477647.json b/.changes/bc0b11a8-48ce-4bc0-8b3f-4ee858477647.json
new file mode 100644
index 00000000..1d972dc4
--- /dev/null
+++ b/.changes/bc0b11a8-48ce-4bc0-8b3f-4ee858477647.json
@@ -0,0 +1,5 @@
+{
+    "id": "bc0b11a8-48ce-4bc0-8b3f-4ee858477647",
+    "type": "misc",
+    "description": "Upgrade to kotlinx.coroutines 1.9.0"
+}
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index ca9701e2..31c77e3f 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -5,7 +5,7 @@ aws-kotlin-repo-tools-version = "0.4.10"
 
 # libs
 crt-java-version = "0.30.5"
-coroutines-version = "1.8.1"
+coroutines-version = "1.9.0"
 
 # testing
 junit-version = "5.10.1"