diff --git a/Project.toml b/Project.toml
index 04d17bb..3a038f1 100644
--- a/Project.toml
+++ b/Project.toml
@@ -4,14 +4,10 @@ authors = ["Patrick Kofod Mogensen <patrick.mogensen@gmail.com>"]
 version = "0.4.0"
 
 [deps]
-Cthulhu = "f68482b8-f384-11e8-15f7-abe071a5a75f"
-DoubleFloats = "497a8b3b-efae-58df-a0af-a86822472b78"
 IterativeSolvers = "42fd0dbc-a981-5370-80f2-aaf504508153"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
-LinearMaps = "7a12625a-238d-50fd-b39a-03d52299707e"
 PositiveFactorizations = "85a6dd25-e78a-55b7-8502-1745935b8125"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
-SparseDiffTools = "47a9eef4-7e08-11e9-0b38-333d64bd3804"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]