diff --git a/Cargo.toml b/Cargo.toml
index 69dec0c2a..fad94b38d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,18 +15,18 @@ rust-version = "1.36"
 indexmap = { version = "2", optional = true }
 itoa = "1.0"
 ryu = "1.0"
-serde = { version = "1.0.100", default-features = false }
+serde = { version = "1.0.166", default-features = false }
 
 [dev-dependencies]
-automod = "1.0"
-indoc = "2.0"
-ref-cast = "1.0"
-rustversion = "1.0"
-serde = { version = "1.0.100", features = ["derive"] }
-serde_bytes = "0.11"
-serde_derive = "1.0"
-serde_stacker = "0.1"
-trybuild = { version = "1.0.49", features = ["diff"] }
+automod = "1.0.11"
+indoc = "2.0.2"
+ref-cast = "1.0.18"
+rustversion = "1.0.13"
+serde = { version = "1.0.166", features = ["derive"] }
+serde_bytes = "0.11.10"
+serde_derive = "1.0.166"
+serde_stacker = "0.1.8"
+trybuild = { version = "1.0.81", features = ["diff"] }
 
 [lib]
 doc-scrape-examples = false