diff --git a/Dockerfile b/Dockerfile
index 29e0f61..eab926a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,7 @@ COPY client/package.json client/build.gradle.kts /app/client/
 RUN ./gradlew shadowJar --paralell --no-daemon --continue || true
 
 COPY . /app
+RUN ["./gradlew", "clean"]
 RUN [ "./gradlew", "shadowJar", "--parallel", "--no-daemon" ]
 
 FROM ubuntu:latest
diff --git a/client/src/composables/useCommonTokenSequence.ts b/client/src/composables/useCommonTokenSequence.ts
index 69c898b..42b6c88 100644
--- a/client/src/composables/useCommonTokenSequence.ts
+++ b/client/src/composables/useCommonTokenSequence.ts
@@ -623,6 +623,9 @@ function getIndexFromPosition(text: string, position: monaco.Position): number {
   if (position.lineNumber === raws.length + 1 && position.column === 0) {
     return indexCount
   }
+  if (raws[0] == "This is a binary file.") {
+    return 0
+  }
   throw new Error(
     `position ${position.toString()} must be less than text which has ${
       raws.length