diff --git a/app/dictionary-tools.gradle b/app/dictionary-tools.gradle
index 2241bb0b..7ca4d45a 100644
--- a/app/dictionary-tools.gradle
+++ b/app/dictionary-tools.gradle
@@ -56,10 +56,16 @@ class Wrapper {
 
 
 	static def getLanguageHash(File definitionFile, File dictionaryFile) {
-		def definitionHash = definitionFile != null && definitionFile.exists() ? definitionFile.text.digest("SHA-256") : ""
-		def dictionaryHash = dictionaryFile != null && dictionaryFile.exists() ? dictionaryFile.text.digest("SHA-256") : ""
+		def definitionHash = definitionFile != null && definitionFile.exists() ? sha256(definitionFile.path) : ""
+		def dictionaryHash = dictionaryFile != null && dictionaryFile.exists() ? sha256(dictionaryFile.path) : ""
 		return definitionHash + dictionaryHash
 	}
+
+
+	static def sha256(String filePath) {
+		def parts = "sha256sum $filePath".execute().text.trim().split(" ")
+		return parts.length > 0 ? parts[0] : ""
+	}
 }
 
 ext.DictionaryTools = Wrapper