diff --git a/Project.toml b/Project.toml
index 9065ad512..f7ab971be 100644
--- a/Project.toml
+++ b/Project.toml
@@ -43,7 +43,7 @@ MPSKit = "0.14"
 MPSKitModels = "0.4"
 MatrixAlgebraKit = "0.6.5"
 OhMyThreads = "0.7, 0.8"
-OptimKit = "0.4, 0.5"
+OptimKit = "0.5"
 Printf = "1"
 Random = "1"
 Statistics = "1"
diff --git a/src/PEPSKit.jl b/src/PEPSKit.jl
index 827a16689..3fd665a84 100644
--- a/src/PEPSKit.jl
+++ b/src/PEPSKit.jl
@@ -23,6 +23,7 @@ using KrylovKit
 using KrylovKit: Lanczos, BlockLanczos
 
 using TensorOperations, OptimKit
+import OptimKit: fixedpoint
 using ChainRulesCore, Zygote
 using LoggingExtras
 import TupleTools