diff --git a/Controller.cpp b/Controller.cpp
index d3c9205..0ce82f7 100644
--- a/Controller.cpp
+++ b/Controller.cpp
@@ -37,7 +37,7 @@ void Controller::handleTransaction()
 		else
 			enableACTLED(false);
 		}
-	catch (runtime_error)
+	catch (runtime_error& ignored)
 	{}
 
 	auto msg = U2FMessage::readNonBlock();
diff --git a/Streams.cpp b/Streams.cpp
index df2307d..32c8c7f 100644
--- a/Streams.cpp
+++ b/Streams.cpp
@@ -133,7 +133,7 @@ FILE* initHTML(FILE *fPtr, const string &title)
 				"\t\t<style>\n"
 				"\t\t\ttable {\n"
 				"\t\t\t\tdisplay: table;\n"
-				"\t\t\t\twidth: 100%;\n"
+				"\t\t\t\twidth: 100%%;\n"
 				"\t\t\t\tborder-collapse: collapse;\n"
 				"\t\t\t\tbox-sizing: border-box;\n"
 				"\t\t\t}\n"
@@ -151,7 +151,7 @@ FILE* initHTML(FILE *fPtr, const string &title)
 				"\t\t\t\toverflow: hidden;\n"
 				"\t\t\t\ttext-overflow: ellipsis;\n"
 				"\t\t\t\tmax-width:1px;\n"
-				"\t\t\t\twidth:100%;\n"
+				"\t\t\t\twidth:100%%;\n"
 				"\t\t\t}\n"
 				"\n"
 				"\t\t\ttd.data:hover {\n"
diff --git a/U2F_CMD.cpp b/U2F_CMD.cpp
index 4ce0138..3de008a 100644
--- a/U2F_CMD.cpp
+++ b/U2F_CMD.cpp
@@ -40,7 +40,7 @@ shared_ptr<U2F_CMD> U2F_CMD::get(const shared_ptr<U2FMessage> uMsg)
 				return {};
 		}
 	}
-	catch (runtime_error)
+	catch (runtime_error& ignored)
 	{
 		return {};
 	}
diff --git a/U2F_Msg_CMD.cpp b/U2F_Msg_CMD.cpp
index e1b95a6..3c3907d 100644
--- a/U2F_Msg_CMD.cpp
+++ b/U2F_Msg_CMD.cpp
@@ -114,7 +114,7 @@ shared_ptr<U2F_Msg_CMD> U2F_Msg_CMD::generate(const shared_ptr<U2FMessage> uMsg)
 		{
 			cmd.le = getLe(data.end() - endPtr, vector<uint8_t>(endPtr, data.end()));
 		}
-		catch (runtime_error)
+		catch (runtime_error& ignored)
 		{
 			U2F_Msg_CMD::error(uMsg->cid, APDU_STATUS::SW_WRONG_LENGTH);
 			throw;
@@ -129,7 +129,7 @@ shared_ptr<U2F_Msg_CMD> U2F_Msg_CMD::generate(const shared_ptr<U2FMessage> uMsg)
 		{
 			cmd.le = getLe(cBCount, data);
 		}
-		catch (runtime_error)
+		catch (runtime_error& ignored)
 		{
 			U2F_Msg_CMD::error(uMsg->cid, APDU_STATUS::SW_WRONG_LENGTH);
 			throw;