diff --git a/.changeset/fix-blockfrost-evaluate-tx-reference-script.md b/.changeset/fix-blockfrost-evaluate-tx-reference-script.md
new file mode 100644
index 00000000..7a7fd57b
--- /dev/null
+++ b/.changeset/fix-blockfrost-evaluate-tx-reference-script.md
@@ -0,0 +1,5 @@
+---
+"@evolution-sdk/evolution": patch
+---
+
+Fix BlockfrostEffect.evaluateTx dropping reference scripts from additionalUtxoSet, which caused missingRequiredScripts errors when evaluating transactions that reference unconfirmed UTxOs carrying minting policies.
diff --git a/packages/evolution/src/sdk/provider/internal/BlockfrostEffect.ts b/packages/evolution/src/sdk/provider/internal/BlockfrostEffect.ts
index 4271f0b4..6f0ccb3a 100644
--- a/packages/evolution/src/sdk/provider/internal/BlockfrostEffect.ts
+++ b/packages/evolution/src/sdk/provider/internal/BlockfrostEffect.ts
@@ -652,6 +652,11 @@ export const evaluateTx =
               txOut.datumHash = utxo.datumHash
             }
 
+            // Add script if present (required for reference script UTxOs)
+            if (utxo.script) {
+              txOut.script = utxo.script
+            }
+
             return [txIn, txOut]
           })
         : []