diff --git a/packaging/nsis/wireshark.nsi b/packaging/nsis/wireshark.nsi
index 37a9677c2b..45ab8c4df8 100644
--- a/packaging/nsis/wireshark.nsi
+++ b/packaging/nsis/wireshark.nsi
@@ -10,6 +10,7 @@
 ; This unfortunately is unknown to NSIS prior to 2.07 and creates an error.
 ; So if you get an error here, please update to at least NSIS 2.07!
 SetCompressor /SOLID lzma
+SetCompressorDictSize 64 ; MB
 
 !include "common.nsh"
 !include 'LogicLib.nsh'
diff --git a/packaging/portableapps/win32/Installer.nsi b/packaging/portableapps/win32/Installer.nsi
index 3b87defce6..842bce2d46 100755
--- a/packaging/portableapps/win32/Installer.nsi
+++ b/packaging/portableapps/win32/Installer.nsi
@@ -59,6 +59,7 @@ VIAddVersionKey OriginalFilename "${FILENAME}.paf.exe"
 ;SetDatablockOptimize on
 ;SetCompress off
 SetCompressor /SOLID lzma
+SetCompressorDictSize 64 ; MB
 CRCCheck on
 AutoCloseWindow True
 RequestExecutionLevel user