diff --git a/Cargo.lock b/Cargo.lock
index 65c8629..9a2ebf7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -799,7 +799,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6da45c8333f2e152fc665d78a380be060eb84fad8ca4c9f7ac8ca29216cff0cc"
 dependencies = [
  "num-traits",
- "rand",
+ "rand 0.8.5",
  "rand_xorshift",
 ]
 
@@ -1017,8 +1017,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
- "rand_chacha",
- "rand_core",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ec095654a25171c2124e9e3393a930bddbffdc939556c914957a4c3e0a87166"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -1028,7 +1038,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -1040,13 +1060,22 @@ dependencies = [
  "getrandom 0.2.17",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
+dependencies = [
+ "getrandom 0.3.4",
+]
+
 [[package]]
 name = "rand_pcg"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "59cad018caf63deb318e5a4586d99a24424a364f40f1e5778c29aca23f4fc73e"
 dependencies = [
- "rand_core",
+ "rand_core 0.6.4",
 ]
 
 [[package]]
@@ -1055,7 +1084,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d25bf25ec5ae4a3f1b92f929810509a2f53d7dca2f50b794ff57e3face536c8f"
 dependencies = [
- "rand_core",
+ "rand_core 0.6.4",
 ]
 
 [[package]]
@@ -1084,8 +1113,8 @@ dependencies = [
  "once_cell",
  "paste",
  "profiling",
- "rand",
- "rand_chacha",
+ "rand 0.8.5",
+ "rand_chacha 0.3.1",
  "simd_helpers",
  "system-deps",
  "thiserror",
@@ -1657,7 +1686,7 @@ dependencies = [
 name = "ymir-core"
 version = "0.1.0"
 dependencies = [
- "rand",
+ "rand 0.9.3",
  "rand_pcg",
  "serde",
  "serde_json",
@@ -1668,7 +1697,7 @@ name = "ymir-detail"
 version = "0.1.0"
 dependencies = [
  "bincode",
- "rand",
+ "rand 0.9.3",
  "rand_pcg",
  "serde",
  "serde_json",
diff --git a/crates/ymir-core/Cargo.toml b/crates/ymir-core/Cargo.toml
index 2a4184b..004c240 100644
--- a/crates/ymir-core/Cargo.toml
+++ b/crates/ymir-core/Cargo.toml
@@ -16,5 +16,5 @@ categories = ["simulation", "science"]
 [dependencies]
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-rand = "0.8"
+rand = "0.9"
 rand_pcg = "0.3"
diff --git a/crates/ymir-detail/Cargo.toml b/crates/ymir-detail/Cargo.toml
index b033a75..57d6053 100644
--- a/crates/ymir-detail/Cargo.toml
+++ b/crates/ymir-detail/Cargo.toml
@@ -15,7 +15,7 @@ categories = ["simulation", "science"]
 
 [dependencies]
 serde = { version = "1", features = ["derive"] }
-rand = "0.8"
+rand = "0.9"
 rand_pcg = "0.3"
 ymir-core = { path = "../ymir-core", version = "0.1.0" }
 ymir-surface = { path = "../ymir-surface", version = "0.1.0" }