diff --git a/python/Cargo.toml b/python/Cargo.toml
index e2b0ffb..16fa28e 100644
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-textspan = "^0.5"
+textspan = "0.5.2"
 
 [lib]
 name = "textspan"