diff --git a/project/build.properties b/project/build.properties
index 0aa5c39..49214c4 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.9.8
+sbt.version = 1.9.9
diff --git a/test/js/dotty/project/build.properties b/test/js/dotty/project/build.properties
index 63df6ac..f2f1347 100644
--- a/test/js/dotty/project/build.properties
+++ b/test/js/dotty/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.9.8
\ No newline at end of file
+sbt.version = 1.9.9
\ No newline at end of file
diff --git a/test/js/project/build.properties b/test/js/project/build.properties
index 63df6ac..f2f1347 100644
--- a/test/js/project/build.properties
+++ b/test/js/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.9.8
\ No newline at end of file
+sbt.version = 1.9.9
\ No newline at end of file
diff --git a/test/jvm/dotty/project/build.properties b/test/jvm/dotty/project/build.properties
index 63df6ac..f2f1347 100644
--- a/test/jvm/dotty/project/build.properties
+++ b/test/jvm/dotty/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.9.8
\ No newline at end of file
+sbt.version = 1.9.9
\ No newline at end of file
diff --git a/test/jvm/project/build.properties b/test/jvm/project/build.properties
index 63df6ac..f2f1347 100644
--- a/test/jvm/project/build.properties
+++ b/test/jvm/project/build.properties
@@ -1 +1 @@
-sbt.version = 1.9.8
\ No newline at end of file
+sbt.version = 1.9.9
\ No newline at end of file