diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 2263e89..08ec40e 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.7'
+          - '1'
           - '1.6'
           - 'nightly'
         os:
diff --git a/src/passes.jl b/src/passes.jl
index 4731a24..5959242 100644
--- a/src/passes.jl
+++ b/src/passes.jl
@@ -12,7 +12,12 @@ The default julia optimization pass.
 """
 function default_julia_pass(ir::IRCode, sv::OptimizationState)
     ir = compact!(ir)
-    ir = ssa_inlining_pass!(ir, ir.linetable, sv.inlining, sv.src.propagate_inbounds)
+    if VERSION < v"1.9-"
+        ir = ssa_inlining_pass!(ir, ir.linetable, sv.inlining, sv.src.propagate_inbounds)
+    else
+        ir = ssa_inlining_pass!(ir, sv.inlining, sv.src.propagate_inbounds)
+    end
+
     ir = compact!(ir)
 
     @static if VERSION < v"1.8-"
diff --git a/src/patches.jl b/src/patches.jl
index f94795b..da9d21d 100644
--- a/src/patches.jl
+++ b/src/patches.jl
@@ -82,10 +82,12 @@ end
 end
 
 # move this to Base?
-Base.iterate(ic::Core.Compiler.IncrementalCompact) = Core.Compiler.iterate(ic)
-Base.iterate(ic::Core.Compiler.IncrementalCompact, st) = Core.Compiler.iterate(ic, st)
-Base.getindex(ic::Core.Compiler.IncrementalCompact, idx) = Core.Compiler.getindex(ic, idx)
-Base.setindex!(ic::Core.Compiler.IncrementalCompact, v, idx) = Core.Compiler.setindex!(ic, v, idx)
+@static if VERSION < v"1.9-"
+    Base.iterate(ic::Core.Compiler.IncrementalCompact) = Core.Compiler.iterate(ic)
+    Base.iterate(ic::Core.Compiler.IncrementalCompact, st) = Core.Compiler.iterate(ic, st)
+    Base.getindex(ic::Core.Compiler.IncrementalCompact, idx) = Core.Compiler.getindex(ic, idx)
+    Base.setindex!(ic::Core.Compiler.IncrementalCompact, v, idx) = Core.Compiler.setindex!(ic, v, idx)
+end
 
 Base.getindex(ic::Core.Compiler.Instruction, idx) = Core.Compiler.getindex(ic, idx)
 Base.setindex!(ic::Core.Compiler.Instruction, v, idx) = Core.Compiler.setindex!(ic, v, idx)
diff --git a/src/typeinf.jl b/src/typeinf.jl
index 37d41b4..dfb4069 100644
--- a/src/typeinf.jl
+++ b/src/typeinf.jl
@@ -12,8 +12,14 @@ return ret
 ```
 """
 function typeinf_lock(f)
-    ccall(:jl_typeinf_begin, Cvoid, ())
-    ret = f()
-    ccall(:jl_typeinf_end, Cvoid, ())
+    @static if VERSION < v"1.9-"
+        ccall(:jl_typeinf_begin, Cvoid, ())
+        ret = f()
+        ccall(:jl_typeinf_end, Cvoid, ())
+    else
+        ccall(:jl_typeinf_timing_begin, Cvoid, ())
+        ret = f()
+        ccall(:jl_typeinf_timing_end, Cvoid, ())
+    end
     return ret
 end