diff --git a/Cargo.toml b/Cargo.toml
index 43f760e288..66cae353c4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -75,7 +75,7 @@ winapi = "0.3.9"
 
 [dev-dependencies]
 binggan = "0.14.0"
-rand = "0.8.5"
+rand = "0.9.1"
 maplit = "1.0.2"
 matches = "0.1.9"
 pretty_assertions = "1.2.1"
diff --git a/bitpacker/Cargo.toml b/bitpacker/Cargo.toml
index 104f5f8059..ed6ee656ca 100644
--- a/bitpacker/Cargo.toml
+++ b/bitpacker/Cargo.toml
@@ -18,5 +18,5 @@ homepage = "https://github.com/quickwit-oss/tantivy"
 bitpacking = { version = "0.9.2", default-features = false, features = ["bitpacker1x"] }
 
 [dev-dependencies]
-rand = "0.8"
+rand = "0.9"
 proptest = "1"
diff --git a/columnar/Cargo.toml b/columnar/Cargo.toml
index 1048d13fe6..8a5ad5f5ca 100644
--- a/columnar/Cargo.toml
+++ b/columnar/Cargo.toml
@@ -22,7 +22,7 @@ downcast-rs = "2.0.1"
 [dev-dependencies]
 proptest = "1"
 more-asserts = "0.3.1"
-rand = "0.8"
+rand = "0.9"
 binggan = "0.14.0"
 
 [[bench]]
diff --git a/common/Cargo.toml b/common/Cargo.toml
index 63394e7a29..0c3352a878 100644
--- a/common/Cargo.toml
+++ b/common/Cargo.toml
@@ -21,5 +21,5 @@ serde = { version = "1.0.136", features = ["derive"] }
 [dev-dependencies]
 binggan = "0.14.0"
 proptest = "1.0.0"
-rand = "0.8.4"
+rand = "0.9.1"
 
diff --git a/sstable/Cargo.toml b/sstable/Cargo.toml
index 0ec2eae8f0..6955598c1b 100644
--- a/sstable/Cargo.toml
+++ b/sstable/Cargo.toml
@@ -22,7 +22,7 @@ zstd = { version = "0.13", features = ["experimental"] }
 proptest = "1"
 criterion = { version = "0.5", default-features = false }
 names = "0.14"
-rand = "0.8"
+rand = "0.9"
 
 [[bench]]
 name = "stream_bench"
diff --git a/stacker/Cargo.toml b/stacker/Cargo.toml
index b1cde232f3..7505b54624 100644
--- a/stacker/Cargo.toml
+++ b/stacker/Cargo.toml
@@ -24,7 +24,7 @@ name = "hashmap"
 path = "example/hashmap.rs"
 
 [dev-dependencies]
-rand = "0.8.5"
+rand = "0.9.1"
 zipf = "7.0.0"
 rustc-hash = "2.1.0"
 proptest = "1.2.0"