diff --git a/Cargo.toml b/Cargo.toml
index 06a7c11..9d79997 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ num-complex = { version = "0.4", optional = true }
 num-bigint = { version = "0.4", optional = true }
 num-traits = { version = "0.2", optional = true }
 num-integer = { version = "0.1", optional = true }
-malachite-bigint = { version = "0.2", optional = true }
+malachite-bigint = { version = "0", optional = true }  # malachite upgrades minor version a lot
 
 [dev-dependencies]
 proptest = "1.6.0"