diff --git a/Cargo.toml b/Cargo.toml
index d4ccda8e5564..d3a81bfee667 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -211,17 +211,17 @@ alloy-node-bindings = { version = "0.9.0", default-features = false }
 alloy-network-primitives = { version = "0.9.0", default-features = false }
 
 ## alloy-core
-alloy-dyn-abi = "0.8.14"
-alloy-json-abi = "0.8.14"
-alloy-primitives = { version = "0.8.14", features = [
+alloy-dyn-abi = "0.8.16"
+alloy-json-abi = "0.8.16"
+alloy-primitives = { version = "0.8.16", features = [
     "getrandom",
     "rand",
     "map-foldhash",
 ] }
-alloy-sol-macro-expander = "0.8.14"
-alloy-sol-macro-input = "0.8.14"
-alloy-sol-types = "0.8.14"
-syn-solidity = "0.8.14"
+alloy-sol-macro-expander = "0.8.16"
+alloy-sol-macro-input = "0.8.16"
+alloy-sol-types = "0.8.16"
+syn-solidity = "0.8.16"
 
 alloy-chains = "0.1"
 alloy-rlp = "0.3"
diff --git a/crates/forge/tests/it/repros.rs b/crates/forge/tests/it/repros.rs
index 2a47d3d3efd1..863b8b28479e 100644
--- a/crates/forge/tests/it/repros.rs
+++ b/crates/forge/tests/it/repros.rs
@@ -389,3 +389,6 @@ test_repro!(8971; |config| {
 
 // https://github.com/foundry-rs/foundry/issues/8639
 test_repro!(8639);
+
+// https://github.com/foundry-rs/foundry/issues/8566
+test_repro!(8566);
diff --git a/testdata/default/repros/Issue8566.t.sol b/testdata/default/repros/Issue8566.t.sol
new file mode 100644
index 000000000000..f300d096f7a2
--- /dev/null
+++ b/testdata/default/repros/Issue8566.t.sol
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity ^0.8.18;
+
+import "ds-test/test.sol";
+import "cheats/Vm.sol";
+
+// https://github.com/foundry-rs/foundry/issues/8566
+contract Issue8566Test is DSTest {
+    Vm constant vm = Vm(HEVM_ADDRESS);
+
+    function testParseJsonUint() public {
+        string memory json =
+            "{ \"1284\": { \"addRewardInfo\": { \"amount\": 74258.225772486694040708e18, \"rewardPerSec\": 0.03069536448928848133e20 } } }";
+
+        assertEq(74258225772486694040708, vm.parseJsonUint(json, ".1284.addRewardInfo.amount"));
+        assertEq(3069536448928848133, vm.parseJsonUint(json, ".1284.addRewardInfo.rewardPerSec"));
+    }
+}