diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c576bced96..47c904a8fd 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -41,7 +41,7 @@ jobs:
       matrix:
         java_distribution: [ temurin ]
         java_version: [ 17, 21, 25 ]
-        scala_version: [ 3.3.8 ]
+        scala_version: [ 3.3.7 ]
         os: [ ubuntu-22.04, windows-2022, macos-14 ]
         exclude:
           # only run macos on java 17
@@ -89,7 +89,7 @@ jobs:
       SONARSCAN: ${{
         matrix.os == 'ubuntu-22.04' &&
         matrix.java_version == '17' &&
-        matrix.scala_version == '3.3.8' &&
+        matrix.scala_version == '3.3.7' &&
         github.event_name == 'push' &&
         github.repository == 'apache/daffodil' &&
         github.ref == 'refs/heads/main'
@@ -246,7 +246,7 @@ jobs:
       matrix:
         java_distribution: [ temurin ]
         java_version: [ 17 ]
-        scala_version: [ 3.3.8 ]
+        scala_version: [ 3.3.7 ]
         os: [ ubuntu-22.04 ]
     runs-on: ${{ matrix.os }}
     env:
diff --git a/build.sbt b/build.sbt
index c2f4aaed9f..b9f9801745 100644
--- a/build.sbt
+++ b/build.sbt
@@ -181,8 +181,8 @@ val minSupportedJavaVersion: String = "17"
 lazy val commonSettings = Seq(
   organization := "org.apache.daffodil",
   version := IO.read((ThisBuild / baseDirectory).value / "VERSION").trim,
-  scalaVersion := "3.3.8",
-  crossScalaVersions := Seq("3.3.8"),
+  scalaVersion := "3.3.7",
+  crossScalaVersions := Seq("3.3.7"),
   scalacOptions ++= buildScalacOptions(scalaVersion.value),
   Test / scalacOptions ++= buildTestScalacOptions(scalaVersion.value),
   Compile / compile / javacOptions ++= buildJavacOptions(),