diff --git a/ports/prometheus-cpp/CONTROL b/ports/prometheus-cpp/CONTROL
index 290038bd03..99b84715cc 100644
--- a/ports/prometheus-cpp/CONTROL
+++ b/ports/prometheus-cpp/CONTROL
@@ -1,5 +1,5 @@
 Source: prometheus-cpp
-Version: 0.8.0
+Version: 0.9.0
 Description: Prometheus Client Library for Modern C++
 Default-Features: compression, pull
 
diff --git a/ports/prometheus-cpp/portfile.cmake b/ports/prometheus-cpp/portfile.cmake
index add7064cc7..c6048af185 100644
--- a/ports/prometheus-cpp/portfile.cmake
+++ b/ports/prometheus-cpp/portfile.cmake
@@ -5,8 +5,8 @@ vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO jupp0r/prometheus-cpp
-    REF v0.8.0
-    SHA512 23cb0de4022f6a05e58aff37f36a499d062849c34772994fc69887a72462591553c7098492f18a8a86b5c31e70a0b93813a7cb7e5adb1974897e9f38053f543a
+    REF v0.9.0
+    SHA512 d9d5fbbd8c8aad5dd6a5e872275324d689a0c57199e4158d74e13ea62b286fa71dee01bb4197b906b79792bf1ca4e67a46b5c04621d7070241ac32876f6de891
     HEAD_REF master
 )