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-rw-r--r--bit_field/bit_field_derive/Cargo.toml6
1 files changed, 3 insertions, 3 deletions
diff --git a/bit_field/bit_field_derive/Cargo.toml b/bit_field/bit_field_derive/Cargo.toml
index df84a2a..4642b93 100644
--- a/bit_field/bit_field_derive/Cargo.toml
+++ b/bit_field/bit_field_derive/Cargo.toml
@@ -5,9 +5,9 @@ authors = ["The Chromium OS Authors"]
 edition = "2018"
 
 [dependencies]
-proc-macro2 = "=0.4"
-quote = "=0.6"
-syn = "=0.15"
+proc-macro2 = "^1"
+quote = "^1"
+syn = "^1"
 
 [lib]
 proc-macro = true