diff --git a/contracts/foundry.toml b/contracts/foundry.toml
index 7ae2b66b..530532e3 100644
--- a/contracts/foundry.toml
+++ b/contracts/foundry.toml
@@ -6,7 +6,7 @@ evm_version = 'shanghai'
 ignored_error_codes = [5574] # contract-size
 fs_permissions = [
     { access = "read", path = "./utils/assets/" },
-    { access = "write", path = "./deployment-manifest.json" }
+    { access = "read-write", path = "./deployment-manifest.json" }
 ]
 
 [invariant]
diff --git a/contracts/src/scripts/OpenTroves.s.sol b/contracts/src/scripts/OpenTroves.s.sol
index 560e1016..14c52dc3 100644
--- a/contracts/src/scripts/OpenTroves.s.sol
+++ b/contracts/src/scripts/OpenTroves.s.sol
@@ -71,10 +71,27 @@ contract OpenTroves is Script {
     function run() external {
         vm.startBroadcast();
 
-        ICollateralRegistry collateralRegistry = ICollateralRegistry(vm.envAddress("COLLATERAL_REGISTRY"));
+        string memory manifestJson;
+        try vm.readFile("deployment-manifest.json") returns (string memory content) {
+            manifestJson = content;
+        } catch {}
+
+        ICollateralRegistry collateralRegistry;
+        try vm.envAddress("COLLATERAL_REGISTRY") returns (address value) {
+            collateralRegistry = ICollateralRegistry(value);
+        } catch {
+            collateralRegistry = ICollateralRegistry(vm.parseJsonAddress(manifestJson, ".collateralRegistry"));
+        }
         vm.label(address(collateralRegistry), "CollateralRegistry");
-        IHintHelpers hintHelpers = IHintHelpers(vm.envAddress("HINT_HELPERS"));
+
+        IHintHelpers hintHelpers;
+        try vm.envAddress("HINT_HELPERS") returns (address value) {
+            hintHelpers = IHintHelpers(value);
+        } catch {
+            hintHelpers = IHintHelpers(vm.parseJsonAddress(manifestJson, ".hintHelpers"));
+        }
         vm.label(address(hintHelpers), "HintHelpers");
+
         address proxyImplementation = address(new Proxy());
         vm.label(proxyImplementation, "ProxyImplementation");
 
diff --git a/contracts/src/scripts/RedeemCollateral.s.sol b/contracts/src/scripts/RedeemCollateral.s.sol
index ded80845..25a46c18 100644
--- a/contracts/src/scripts/RedeemCollateral.s.sol
+++ b/contracts/src/scripts/RedeemCollateral.s.sol
@@ -16,8 +16,19 @@ contract RedeemCollateral is Script {
     function run() external {
         vm.startBroadcast();
 
-        ICollateralRegistry collateralRegistry = ICollateralRegistry(vm.envAddress("COLLATERAL_REGISTRY"));
+        string memory manifestJson;
+        try vm.readFile("deployment-manifest.json") returns (string memory content) {
+            manifestJson = content;
+        } catch {}
+
+        ICollateralRegistry collateralRegistry;
+        try vm.envAddress("COLLATERAL_REGISTRY") returns (address value) {
+            collateralRegistry = ICollateralRegistry(value);
+        } catch {
+            collateralRegistry = ICollateralRegistry(vm.parseJsonAddress(manifestJson, ".collateralRegistry"));
+        }
         vm.label(address(collateralRegistry), "CollateralRegistry");
+
         IBoldToken boldToken = IBoldToken(collateralRegistry.boldToken());
         vm.label(address(boldToken), "BoldToken");