diff --git a/matrixcompare-mock/Cargo.toml b/matrixcompare-mock/Cargo.toml
index 4e8bceb..7dc2add 100644
--- a/matrixcompare-mock/Cargo.toml
+++ b/matrixcompare-mock/Cargo.toml
@@ -8,7 +8,7 @@ repository = "https://github.com/Andlon/matrixcompare"
 description = "Internal mock data structures for testing of matrixcompare"
 
 [dependencies]
-num = "0.3"
+num = "0.4"
 matrixcompare-core = { path = "../matrixcompare-core", version="0.1" }
 proptest = "0.10"