diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 7e44fde0f1..ac33d25b5e 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -24,4 +24,4 @@ Describe what you expect the output to be. Knowing the correct behavior is also
 Provide any additional information here.
 
 #### Current Version:
-v2.27.0
+v2.28.0-rc3
diff --git a/makefile b/makefile
index 39948c27c8..bf6a398e50 100644
--- a/makefile
+++ b/makefile
@@ -138,7 +138,7 @@ include make/program
 include make/tests
 include make/command
 
-CMDSTAN_VERSION := 2.27.0
+CMDSTAN_VERSION := 2.28.0
 
 ifeq ($(OS),Windows_NT)
 HELP_MAKE=mingw32-make