diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9a7c95ebf..aa302d0db 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,7 +79,7 @@ jobs:
             ;;
           5)
             # build from fresh IO, LM, and Zinc
-            BUILD_VERSION="1.4.0-SNAPSHOT"
+            BUILD_VERSION="1.5.0-SNAPSHOT"
             cd io
             sbt -v -Dsbt.build.version=${BUILD_VERSION} +publishLocal
             cd ../
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 85dd1c471..c97c74da6 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -45,7 +45,7 @@ jobs:
       run: |
         # build from fresh IO, LM, and Zinc
         TIMESTAMP=$(TZ=UTC date +%Y%m%dT%H%M%S)
-        export BUILD_VERSION="1.4.0-bin-${TIMESTAMP}"
+        export BUILD_VERSION="1.5.0-bin-${TIMESTAMP}"
         cd io
         sbt -v +publish
         cd ../
diff --git a/build.sbt b/build.sbt
index 2c0f7dece..986281f56 100644
--- a/build.sbt
+++ b/build.sbt
@@ -8,7 +8,7 @@ import java.nio.file.{ Files, Path => JPath }
 import scala.util.Try
 
 ThisBuild / version := {
-  val v = "1.4.3-SNAPSHOT"
+  val v = "1.5.0-SNAPSHOT"
   nightlyVersion.getOrElse(v)
 }
 ThisBuild / versionScheme := Some("early-semver")