diff --git a/Cargo.toml b/Cargo.toml
index d883f41..5c1c6b9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,14 +22,14 @@ diff = ["dissimilar"]
 dissimilar = { version = "1.0", optional = true }
 glob = "0.3"
 once_cell = "1.9"
-serde = "1.0.139"
-serde_derive = "1.0.139"
-serde_json = "1.0"
+serde = "1.0.166"
+serde_derive = "1.0.166"
+serde_json = "1.0.99"
 termcolor = "1.0.4"
 basic-toml = "0.1"
 
 [dev-dependencies]
-automod = "1.0"
+automod = "1.0.10"
 
 [lib]
 doc-scrape-examples = false