diff --git a/Project.toml b/Project.toml
index 55077d7d..57d5b4e0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ ThreadPools = "b189fb0b-2eb5-4ed4-bc0c-d34c51242431"
 Chemfiles = "0.9.3"
 FortranFiles = "0.6.0"
 JSON3 = "1.1.1"
-PDBTools = "0.5, 0.6, 0.7"
+PDBTools = "0.5 - 1.0"
 Parameters = "0.12.1"
 ProgressMeter = "1.3.1"
 StructTypes = "1.1.0"