diff --git a/source/dub/internal/vibecompat/core/file.d b/source/dub/internal/vibecompat/core/file.d
index 2d8e946..3328458 100644
--- a/source/dub/internal/vibecompat/core/file.d
+++ b/source/dub/internal/vibecompat/core/file.d
@@ -25,11 +25,12 @@
 /* Add output range support to File
 */
 struct RangeFile {
+@safe:
 	std.stdio.File file;
 
-	void put(in ubyte[] bytes) { file.rawWrite(bytes); }
-	void put(in char[] str) { put(cast(ubyte[])str); }
-	void put(char ch) { put((&ch)[0 .. 1]); }
+	void put(in ubyte[] bytes) @trusted { file.rawWrite(bytes); }
+	void put(in char[] str) { put(cast(const(ubyte)[])str); }
+	void put(char ch) @trusted { put((&ch)[0 .. 1]); }
 	void put(dchar ch) { char[4] chars; put(chars[0 .. encode(chars, ch)]); }
 
 	ubyte[] readAll()
@@ -42,7 +43,7 @@
 		return ret;
 	}
 
-	void rawRead(ubyte[] dst) { enforce(file.rawRead(dst).length == dst.length, "Failed to readall bytes from file."); }
+	void rawRead(ubyte[] dst) @trusted { enforce(file.rawRead(dst).length == dst.length, "Failed to readall bytes from file."); }
 	void write(string str) { put(str); }
 	void close() { file.close(); }
 	void flush() { file.flush(); }