diff --git a/src/winkeyer.cpp b/src/winkeyer.cpp
index 1eb2ff2..8b0b75b 100644
--- a/src/winkeyer.cpp
+++ b/src/winkeyer.cpp
@@ -17,23 +17,17 @@ void WinKeyer::run(queue_t &queue)
 
         if (count > 0) {
             switch (buf[0]) {
-            case 'a' ... 'z':
+            case '\"':
                 [[fallthrough]];
-            case 'A' ... 'Z':
+            case '$':
                 [[fallthrough]];
-            case '0' ... '9':
+            case '\'':
                 [[fallthrough]];
-            case ' ':
+            case '(':
                 [[fallthrough]];
-            case '+':
+            case ')':
                 [[fallthrough]];
-            case '=':
-                [[fallthrough]];
-            case '?':
-                [[fallthrough]];
-            case ',':
-                [[fallthrough]];
-            case '.': {
+            case '+' ... ']': {
                 KeyerQueueData keyerQueueData {KeyerQueueCommand::SendMessage, 0, Mode::IambicB, buf[0]};
                 queue_add_blocking(&queue, &keyerQueueData);
                 break;