diff --git a/Cargo.lock b/Cargo.lock
index 92d4215e..41a4d01b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -121,9 +121,9 @@ version = "0.3.1"
 
 [[package]]
 name = "prettyplease"
-version = "0.2.20"
+version = "0.2.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f12335488a2f3b0a83b14edad48dca9879ce89b2edd10e80237e4e852dd645e"
+checksum = "64d1ec885c64d0457d564db4ec299b2dae3f9c02808b8ad9c3a089c591b18033"
 dependencies = [
  "proc-macro2",
  "syn",
@@ -187,9 +187,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.67"
+version = "2.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff8655ed1d86f3af4ee3fd3263786bc14245ad17c4c7e85ba7187fb3ae028c90"
+checksum = "5023162dfcd14ef8f32034d8bcd4cc5ddc61ef7a247c024a33e24e1f24d21b56"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/fiat-constify/Cargo.toml b/fiat-constify/Cargo.toml
index b86fe12c..981b7249 100644
--- a/fiat-constify/Cargo.toml
+++ b/fiat-constify/Cargo.toml
@@ -16,7 +16,7 @@ readme = "README.md"
 edition = "2021"
 
 [dependencies]
-prettyplease = "0.2.19"
+prettyplease = "0.2.25"
 proc-macro2 = "1"
 quote = "1"
 syn = { version = "2", features = ["extra-traits", "full"] }