diff --git a/FlippR-Driver/include/output/items/Display.h b/FlippR-Driver/include/output/items/Display.h
index f769cdf..813b408 100644
--- a/FlippR-Driver/include/output/items/Display.h
+++ b/FlippR-Driver/include/output/items/Display.h
@@ -24,7 +24,7 @@ public:
   virtual ~Display() = default;
 
   virtual void write_score(uint64_t score) = 0;
-  virtual void write_content(std::string & content) = 0;
+  virtual void write_content(const std::string content) = 0;
 };
 
 }
diff --git a/FlippR-Driver/src/output/items/detail/Display.cpp b/FlippR-Driver/src/output/items/detail/Display.cpp
index fa21baa..a4f94de 100644
--- a/FlippR-Driver/src/output/items/detail/Display.cpp
+++ b/FlippR-Driver/src/output/items/detail/Display.cpp
@@ -54,12 +54,13 @@ std::string Display::fit_score_string(std::string & score_string, const unsigned
   return score_string;
 }
 
-void Display::write_content(std::string & content, const unsigned int & length)
+void Display::write_content(const std::string content, const unsigned int & length)
 {
   if(content.size() > length)
   {
     CLOG(WARNING, OUTPUT_LOGGER) << "Cannot write more than " << length << " digits on " << length << "-Digit Display. Truncating!";
-    content = content.substr(0, length);
+    this->content = content.substr(0, length);
+    return;
   }
 
   this->content = content;
diff --git a/FlippR-Driver/src/output/items/detail/Display.h b/FlippR-Driver/src/output/items/detail/Display.h
index f7233a8..bdc79e6 100644
--- a/FlippR-Driver/src/output/items/detail/Display.h
+++ b/FlippR-Driver/src/output/items/detail/Display.h
@@ -28,7 +28,7 @@ public:
   virtual ~Display() = default;
 
   void write_score(const uint64_t & score, const unsigned int & length);
-  void write_content(std::string & content, const unsigned int & length);
+  void write_content(const std::string content, const unsigned int & length);
 
   std::string get_content() const override;
   uint8_t get_address() const override;
diff --git a/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h b/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h
index f77cc77..e350181 100644
--- a/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h
+++ b/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h
@@ -36,7 +36,7 @@ public:
     detail::Display::write_score(score, 8);
   }
 
-  void write_content(std::string & content) override
+  void write_content(const std::string content) override
   {
     detail::Display::write_content(content, 8);
   }
diff --git a/FlippR-Driver/src/output/items/detail/SevenDigitDisplay.h b/FlippR-Driver/src/output/items/detail/SevenDigitDisplay.h
index 7c1054b..ca218ad 100644
--- a/FlippR-Driver/src/output/items/detail/SevenDigitDisplay.h
+++ b/FlippR-Driver/src/output/items/detail/SevenDigitDisplay.h
@@ -31,7 +31,7 @@ public:
   {
     detail::Display::write_score(score, 7);
   }
-  void write_content(std::string & content) override
+  void write_content(const std::string content) override
   {
     detail::Display::write_content(content, 7);
   }