diff --git a/Cargo.toml b/Cargo.toml
index ab2341d8..c7beb4c1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ rust-version = "1.63"
 exclude = ["src/css-parsing-tests/**", "src/big-data-url.css"]
 
 [dev-dependencies]
-serde_json = "1.0"
+serde_json = "1.0.25"
 difference = "2.0"
 encoding_rs = "0.8"
 
@@ -23,7 +23,7 @@ encoding_rs = "0.8"
 cssparser-macros = {path = "./macros", version = "0.6.1"}
 dtoa-short = "0.3"
 itoa = "1.0"
-phf = {version = ">=0.8,<=0.11", features = ["macros"]}
+phf = {version = "0.11.2", features = ["macros"]}
 serde = {version = "1.0", optional = true}
 smallvec = "1.0"
 
diff --git a/color/Cargo.toml b/color/Cargo.toml
index d65ee3ed..d1e315a8 100644
--- a/color/Cargo.toml
+++ b/color/Cargo.toml
@@ -15,6 +15,6 @@ path = "lib.rs"
 cssparser = { version = "0.33", path = ".." }
 
 [dev-dependencies]
-serde_json = "1.0"
+serde_json = "1.0.25"
 difference = "2.0"
 encoding_rs = "0.8"
diff --git a/macros/Cargo.toml b/macros/Cargo.toml
index 1c225bf2..494705f9 100644
--- a/macros/Cargo.toml
+++ b/macros/Cargo.toml
@@ -13,5 +13,5 @@ path = "lib.rs"
 proc-macro = true
 
 [dependencies]
-quote = "1"
+quote = "1.0.29"
 syn = {version = "2", features = ["full", "extra-traits"]}