diff --git a/src/config.inc b/src/config.inc
index 7be63f02146..43251f21c6d 100644
--- a/src/config.inc
+++ b/src/config.inc
@@ -76,7 +76,7 @@ endif
 OSX_IDENTITY="Developer ID Application: Daniel Kroening"
 
 # Detailed version information
-CBMC_VERSION = 5.65.1
+CBMC_VERSION = 5.66.0
 
 # Use the CUDD library for BDDs, can be installed using `make -C src cudd-download`
 # CUDD = ../../cudd-3.0.0