diff --git a/src/config.inc b/src/config.inc
index 1a4c9db6dca..a4fd7b602b2 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 = 5.90.0
+CBMC_VERSION = 5.91.0
 
 # Use the CUDD library for BDDs, can be installed using `make -C src cudd-download`
 # CUDD = ../../cudd-3.0.0
diff --git a/src/libcprover-rust/Cargo.toml b/src/libcprover-rust/Cargo.toml
index 286dc065d83..c731b2c15e9 100644
--- a/src/libcprover-rust/Cargo.toml
+++ b/src/libcprover-rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libcprover_rust"
-version = "5.90.0"
+version = "5.91.0"
 edition = "2021"
 description = "Rust API for CBMC and assorted CProver tools"
 repository = "https://github.com/diffblue/cbmc"