diff -u ./whoopsie-0.2.69/lib/bson/bson.c ./whoopsie-0.2.69-fixed/lib/bson/bson.c
--- ./whoopsie-0.2.69/lib/bson/bson.c	2020-04-07 16:48:42.309516071 +0900
+++ ./whoopsie-0.2.69-fixed/lib/bson/bson.c	2020-04-16 17:23:16.296190900 +0900
@@ -605,7 +605,7 @@
     b->cur += 8;
 }
 
-int bson_ensure_space( bson *b, const uint32_t bytesNeeded ) {
+int bson_ensure_space( bson *b, const size_t bytesNeeded ) {
     uint32_t pos = b->cur - b->data;
     char *orig = b->data;
     uint32_t new_size;
@@ -667,7 +667,7 @@
         return BSON_ERROR;
     }
 
-    if ( bson_ensure_space( b, 1 + len + dataSize ) == BSON_ERROR ) {
+    if ( bson_ensure_space( b, (size_t)1 + len + dataSize ) == BSON_ERROR ) {
         return BSON_ERROR;
     }
 
diff -u ./whoopsie-0.2.69/lib/bson/bson.h ./whoopsie-0.2.69-fixed/lib/bson/bson.h
--- ./whoopsie-0.2.69/lib/bson/bson.h	2020-04-07 16:48:42.309516071 +0900
+++ ./whoopsie-0.2.69-fixed/lib/bson/bson.h	2020-04-16 17:21:40.200933633 +0900
@@ -557,7 +557,7 @@
  * @return BSON_OK or BSON_ERROR with the bson error object set.
  *   Exits if allocation fails.
  */
-int bson_ensure_space( bson *b, const uint32_t bytesNeeded );
+int bson_ensure_space( bson *b, const size_t bytesNeeded );
 
 /**
  * Finalize a bson object.
Only in ./whoopsie-0.2.69-fixed/lib/bson/: tags