diff --git a/VERSION b/VERSION
index afad643f..2bf7078b 100644
--- a/VERSION
+++ b/VERSION
@@ -1,7 +1,7 @@
 innoextract 1.7-dev
 
 Known working Inno Setup versions:
-Inno Setup 1.2.10 to 5.5.8
+Inno Setup 1.2.10 to 5.5.9
 
 Bug tracker:
 http://innoextract.constexpr.org/issues
diff --git a/src/setup/data.cpp b/src/setup/data.cpp
index a1fd9711..fd33b5ed 100644
--- a/src/setup/data.cpp
+++ b/src/setup/data.cpp
@@ -144,6 +144,11 @@ void data_entry::load(std::istream & is, const version & version) {
 	if(version >= INNO_VERSION(5, 1, 13)) {
 		flagreader.add(SolidBreak);
 	}
+	if(version >= INNO_VERSION(5, 5, 7)) {
+		// Actually added in Inno Setup 5.5.9 but the data version was not bumped
+		flagreader.add(Sign);
+		flagreader.add(SignOnce);
+	}
 	
 	options |= flagreader;
 	
@@ -184,5 +189,7 @@ NAMES(setup::data_entry::flags, "File Location Option",
 	"chunk encrypted",
 	"chunk compressed",
 	"solid break",
+	"sign",
+	"sign once",
 	"bzipped",
 )
diff --git a/src/setup/data.hpp b/src/setup/data.hpp
index 2a693879..8589334d 100644
--- a/src/setup/data.hpp
+++ b/src/setup/data.hpp
@@ -54,6 +54,8 @@ struct data_entry {
 		ChunkEncrypted,
 		ChunkCompressed,
 		SolidBreak,
+		Sign,
+		SignOnce,
 		
 		// obsolete:
 		BZipped