diff --git a/Project.toml b/Project.toml
index a39ed566..791c898c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -38,7 +38,7 @@ CEnum = "0.4, 0.5"
 ExprTools = "0.1"
 GPUArrays = "11.2.1"
 GPUCompiler = "1.5"
-GPUToolbox = "0.1, 0.2, 0.3"
+GPUToolbox = "0.1, 0.2, 0.3, 1"
 KernelAbstractions = "0.9.1"
 LLVM = "6, 7, 8, 9"
 NEO_jll = "=25.31.34666"