diff --git a/b3sum/Cargo.lock b/b3sum/Cargo.lock
index 2ee0e94..153424e 100644
--- a/b3sum/Cargo.lock
+++ b/b3sum/Cargo.lock
@@ -104,9 +104,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.1.1"
+version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "907d8581360765417f8f2e0e7d602733bbed60156b4465b7617243689ef9b83d"
+checksum = "324c74f2155653c90b04f25b2a47a8a631360cb908f92a772695f430c7e31052"
 
 [[package]]
 name = "cfg-if"