diff --git a/PdfFile/lib/xpdf/Stream.cc b/PdfFile/lib/xpdf/Stream.cc
index 5a7b0eefd0..8119de4f75 100644
--- a/PdfFile/lib/xpdf/Stream.cc
+++ b/PdfFile/lib/xpdf/Stream.cc
@@ -1440,7 +1440,7 @@ GBool LZWStream::processNextCode() {
   totalOut += seqLength;
 
   // check for a 'decompression bomb'
-  if (totalOut > 50000000 && totalIn < totalOut / 250) {
+  if (totalOut > 500000000 && totalIn < totalOut / 250) {
     error(errSyntaxError, getPos(), "Decompression bomb in flate stream");
     eof = gTrue;
     return gFalse;
@@ -5252,7 +5252,7 @@ void FlateStream::readSome() {
   totalOut += remain;
 
   // check for a 'decompression bomb'
-  if (totalOut > 100000000 && totalIn < totalOut / 250) {
+  if (totalOut > 500000000 && totalIn < totalOut / 250) {
     error(errSyntaxError, getPos(), "Decompression bomb in flate stream");
     endOfBlock = eof = gTrue;
     remain = 0;