diff --git a/lib/std/rand.zig b/lib/std/rand.zig
index d4235722d0..66f758cb48 100644
--- a/lib/std/rand.zig
+++ b/lib/std/rand.zig
@@ -23,7 +23,7 @@ const ziggurat = @import("rand/ziggurat.zig");
 const maxInt = std.math.maxInt;
 
 /// Fast unbiased random numbers.
-pub const DefaultPrng = Xoroshiro128;
+pub const DefaultPrng = Xoshiro256;
 
 /// Cryptographically secure random numbers.
 pub const DefaultCsprng = Gimli;