diff --git a/Cargo.toml b/Cargo.toml
index d933609..894348e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,7 +39,7 @@ emcee = "^0.3.0"
 emcee_rand = { version = "^0.3.15", package = "rand" }
 enum_dispatch = "^0.3.9"
 fftw = { version = "^0.8", default-features = false }
-GSL = { version = "^6", default-features = false, optional = true }
+GSL = { version = "^7", default-features = false, optional = true }
 itertools = "^0.12"
 lazy_static = "^1.4"
 libm = "^0.2"