diff --git a/elixir-sdk/Cargo.lock b/elixir-sdk/Cargo.lock
index 5dfdfb31..b145bf81 100644
--- a/elixir-sdk/Cargo.lock
+++ b/elixir-sdk/Cargo.lock
@@ -44,6 +44,15 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f68f53c83ab957f72c32642f3868eec03eb974d1fb82e453128456482613d36"
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.17.0"
@@ -98,12 +107,28 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "cityhasher"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ceab37c9e94f42414cccae77e930232c517f1bb190947018cffb0ab41fc40992"
+
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "darling"
 version = "0.20.10"
@@ -168,6 +193,16 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "displaydoc"
 version = "0.2.5"
@@ -181,16 +216,17 @@ dependencies = [
 
 [[package]]
 name = "eppo_core"
-version = "9.3.0"
+version = "10.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f7a2aa615d3a5848b8cd60921fe67290122054e3e51519cce8e024bd6107c8d"
+checksum = "69b58acef0314f365bbabea7043454276e6de04cc33abdfd508a587203cbc0ed"
 dependencies = [
  "base64",
  "chrono",
+ "cityhasher",
  "derive_more",
  "faststr",
  "log",
- "md5",
+ "md-5",
  "rand 0.9.0",
  "regex",
  "reqwest",
@@ -341,6 +377,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.15"
@@ -738,10 +784,14 @@ dependencies = [
 ]
 
 [[package]]
-name = "md5"
-version = "0.7.0"
+name = "md-5"
+version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "490cc448043f947bae3cbee9c203358d62dbee0db12107a74be5c30ccfd09771"
+checksum = "d89e7ee0cfbedfc4da3340218492196241d89eefb6dab27de5df917a6d2e78cf"
+dependencies = [
+ "cfg-if",
+ "digest",
+]
 
 [[package]]
 name = "memchr"
@@ -1720,6 +1770,12 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0e13db2e0ccd5e14a544e8a246ba2312cd25223f616442d7f2cb0e3db614236e"
 
+[[package]]
+name = "typenum"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.16"
@@ -1797,6 +1853,12 @@ dependencies = [
  "sval_serde",
 ]
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "want"
 version = "0.3.1"
diff --git a/ruby-sdk/Cargo.lock b/ruby-sdk/Cargo.lock
index 69bbd5c6..b192efb9 100644
--- a/ruby-sdk/Cargo.lock
+++ b/ruby-sdk/Cargo.lock
@@ -354,7 +354,7 @@ dependencies = [
 
 [[package]]
 name = "eppo_client"
-version = "3.7.4"
+version = "3.8.0"
 dependencies = [
  "env_logger",
  "eppo_core",
@@ -369,7 +369,9 @@ dependencies = [
 
 [[package]]
 name = "eppo_core"
-version = "9.3.0"
+version = "10.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69b58acef0314f365bbabea7043454276e6de04cc33abdfd508a587203cbc0ed"
 dependencies = [
  "ahash",
  "base64",
diff --git a/ruby-sdk/Gemfile.lock b/ruby-sdk/Gemfile.lock
index 32fa95c6..895883ee 100644
--- a/ruby-sdk/Gemfile.lock
+++ b/ruby-sdk/Gemfile.lock
@@ -1,9 +1,9 @@
 PATH
   remote: .
   specs:
-    eppo-server-sdk (3.7.4)
+    eppo-server-sdk (3.8.0)
       logger (~> 1.6)
-      rb_sys (~> 0.9.120)
+      rb_sys (~> 0.9.124)
 
 GEM
   remote: https://rubygems.org/
diff --git a/ruby-sdk/eppo-server-sdk.gemspec b/ruby-sdk/eppo-server-sdk.gemspec
index b6d6f4ca..6266125a 100644
--- a/ruby-sdk/eppo-server-sdk.gemspec
+++ b/ruby-sdk/eppo-server-sdk.gemspec
@@ -31,8 +31,8 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
   spec.extensions = ["ext/eppo_client/extconf.rb"]
 
-  # 0.9.120 added Ruby 4.0 to the list of supported version
-  spec.add_dependency "rb_sys", "~> 0.9.120"
+  # 0.9.124 added Ruby 4.0 to the list of supported versions
+  spec.add_dependency "rb_sys", "~> 0.9.124"
 
   spec.add_dependency "logger", "~> 1.6"