diff --git a/rvsol/foundry.toml b/rvsol/foundry.toml
index 28ac7ad4..f49d8c9e 100644
--- a/rvsol/foundry.toml
+++ b/rvsol/foundry.toml
@@ -2,7 +2,6 @@
 src = 'src'
 out = 'out'
 libs = ['lib']
-libraries = ['src/PreimageKeyLib.sol:PreimageKeyLib:0x0000000000000000000000000000000000007331']
 optimizer = true
 optimizer_runs = 999999
 
diff --git a/rvsol/src/PreimageKeyLib.sol b/rvsol/src/PreimageKeyLib.sol
index 3a8357a2..c3f36cb8 100644
--- a/rvsol/src/PreimageKeyLib.sol
+++ b/rvsol/src/PreimageKeyLib.sol
@@ -9,7 +9,7 @@ library PreimageKeyLib {
     /// @param _ident The identifier of the local data. [0, 32) bytes in size.
     /// @param _localContext The local context for the key.
     /// @return key_ The context-specific local key.
-    function localizeIdent(uint256 _ident, bytes32 _localContext) public view returns (bytes32 key_) {
+    function localizeIdent(uint256 _ident, bytes32 _localContext) internal view returns (bytes32 key_) {
         assembly {
             // Set the type byte in the given identifier to `1` (Local). We only care about
             // the [1, 32) bytes in this value.
@@ -26,7 +26,7 @@ library PreimageKeyLib {
     /// @param _key The local data key to localize.
     /// @param _localContext The local context for the key.
     /// @return localizedKey_ The localized local data key.
-    function localize(bytes32 _key, bytes32 _localContext) public view returns (bytes32 localizedKey_) {
+    function localize(bytes32 _key, bytes32 _localContext) internal view returns (bytes32 localizedKey_) {
         assembly {
             // Grab the current free memory pointer to restore later.
             let ptr := mload(0x40)
@@ -44,7 +44,7 @@ library PreimageKeyLib {
     /// @notice Computes and returns the key for a global keccak pre-image.
     /// @param _preimage The pre-image.
     /// @return key_ The pre-image key.
-    function keccak256PreimageKey(bytes memory _preimage) public pure returns (bytes32 key_) {
+    function keccak256PreimageKey(bytes memory _preimage) internal pure returns (bytes32 key_) {
         assembly {
             // Grab the size of the `_preimage`
             let size := mload(_preimage)