diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d7726b58..e25f4f89 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -14,7 +14,6 @@ jobs:
         group:
           - Core
         version:
-          - '1.6'
           - '1'
     steps:
       - uses: actions/checkout@v4
diff --git a/Project.toml b/Project.toml
index 3415f7bd..52cb0458 100644
--- a/Project.toml
+++ b/Project.toml
@@ -34,7 +34,7 @@ ArrayInterface = "7"
 ConcreteStructs = "0.2"
 DiffEqBase = "6.94.2"
 ForwardDiff = "0.10"
-NonlinearSolve = "1, 2"
+NonlinearSolve = "2"
 ODEInterface = "0.5"
 PreallocationTools = "0.4"
 RecursiveArrayTools = "2.38.10"
@@ -44,7 +44,7 @@ Setfield = "1"
 SparseDiffTools = "2.6"
 TruncatedStacktraces = "1"
 UnPack = "1"
-julia = "1.6"
+julia = "1.9"
 
 [extras]
 DiffEqDevTools = "f3b72e0c-5b89-59e1-b016-84e28bfd966d"