diff --git a/.github/workflows/Check.yml b/.github/workflows/Check.yml
index 12f6fc4..cf8f2f9 100644
--- a/.github/workflows/Check.yml
+++ b/.github/workflows/Check.yml
@@ -17,10 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.6'
-          - '1.7'
-          - '1.8'
-          - '1.9'
+          - '1.10'
           - '1'
           - 'nightly'
     env:
diff --git a/.github/workflows/Test.yml b/.github/workflows/Test.yml
index 9b4f67f..80a63fb 100644
--- a/.github/workflows/Test.yml
+++ b/.github/workflows/Test.yml
@@ -17,10 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.6'
-          - '1.7'
-          - '1.8'
-          - '1.9'
+          - '1.10'
           - '1'
           - 'nightly'
         os:
diff --git a/Project.toml b/Project.toml
index 31e166c..a55e6c9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -9,6 +9,7 @@ Preferences = "21216c6a-2e73-6563-6e65-726566657250"
 [compat]
 JuliaSyntax = "0.4.10"
 Preferences = "1"
+julia = "1.10"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/src/Runic.jl b/src/Runic.jl
index da9ea2e..0fdd152 100644
--- a/src/Runic.jl
+++ b/src/Runic.jl
@@ -5,15 +5,6 @@ module Runic
 using JuliaSyntax:
     JuliaSyntax, @K_str, @KSet_str
 
-# Julia compat for const struct fields
-@eval macro $(Symbol("const"))(field)
-    if VERSION >= v"1.8.0-DEV.1148"
-        Expr(:const, esc(field))
-    else
-        return esc(field)
-    end
-end
-
 # Debug and assert utilities
 include("debug.jl")
 include("JuliaSyntax.jl")
@@ -121,11 +112,11 @@ end
 
 mutable struct Context
     # Input
-    @const src_str::String
-    @const src_tree::Node
-    @const src_io::IOBuffer
+    const src_str::String
+    const src_tree::Node
+    const src_io::IOBuffer
     # Output
-    @const fmt_io::IOBuffer
+    const fmt_io::IOBuffer
     fmt_tree::Union{Node, Nothing}
     # User settings
     quiet::Bool
diff --git a/src/debug.jl b/src/debug.jl
index 37130ae..35e368d 100644
--- a/src/debug.jl
+++ b/src/debug.jl
@@ -4,11 +4,6 @@
 # Debug info #
 ##############
 
-# @lock is defined but not exported in older Julia versions
-if VERSION < v"1.7.0"
-    using Base: @lock
-end
-
 # Code derived from ToggleableAsserts.jl kept in a separate file
 include("ToggleableAsserts.jl")
 
diff --git a/src/main.jl b/src/main.jl
index f68c314..a6263b5 100644
--- a/src/main.jl
+++ b/src/main.jl
@@ -1,10 +1,7 @@
 # SPDX-License-Identifier: MIT
 
-@static if VERSION >= v"1.8"
-    errno::Cint = 0
-else
-    errno = 0
-end
+# Return code of main
+errno::Cint = 0
 
 # Check whether we are compiling with juliac
 using Preferences: @load_preference
diff --git a/test/runtests.jl b/test/runtests.jl
index bbe604f..52ba8d3 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -627,24 +627,22 @@ end
         @test format_string(
             "try\n$(sp)x\n$(sp)finally\n$(sp)y\n$(sp)catch err\n$(sp)z\n$(sp)end"
         ) == "try\n    x\nfinally\n    y\ncatch err\n    z\nend"
-        if VERSION >= v"1.8"
-            # try-catch-else-end
-            @test format_string(
-                "try\n$(sp)x\n$(sp)catch\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)end"
-            ) == "try\n    x\ncatch\n    y\nelse\n    z\nend"
-            # try-catch(err)-else-end
-            @test format_string(
-                "try\n$(sp)x\n$(sp)catch err\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)end"
-            ) == "try\n    x\ncatch err\n    y\nelse\n    z\nend"
-            # try-catch-else-finally-end
-            @test format_string(
-                "try\n$(sp)x\n$(sp)catch\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)finally\n$(sp)z\n$(sp)end"
-            ) == "try\n    x\ncatch\n    y\nelse\n    z\nfinally\n    z\nend"
-            # try-catch(err)-else-finally-end
-            @test format_string(
-                "try\n$(sp)x\n$(sp)catch err\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)finally\n$(sp)z\n$(sp)end"
-            ) == "try\n    x\ncatch err\n    y\nelse\n    z\nfinally\n    z\nend"
-        end
+        # try-catch-else-end
+        @test format_string(
+            "try\n$(sp)x\n$(sp)catch\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)end"
+        ) == "try\n    x\ncatch\n    y\nelse\n    z\nend"
+        # try-catch(err)-else-end
+        @test format_string(
+            "try\n$(sp)x\n$(sp)catch err\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)end"
+        ) == "try\n    x\ncatch err\n    y\nelse\n    z\nend"
+        # try-catch-else-finally-end
+        @test format_string(
+            "try\n$(sp)x\n$(sp)catch\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)finally\n$(sp)z\n$(sp)end"
+        ) == "try\n    x\ncatch\n    y\nelse\n    z\nfinally\n    z\nend"
+        # try-catch(err)-else-finally-end
+        @test format_string(
+            "try\n$(sp)x\n$(sp)catch err\n$(sp)y\n$(sp)else\n$(sp)z\n$(sp)finally\n$(sp)z\n$(sp)end"
+        ) == "try\n    x\ncatch err\n    y\nelse\n    z\nfinally\n    z\nend"
         # do-end
         @test format_string("open() do\n$(sp)a\n$(sp)end") == "open() do\n    a\nend"
         @test format_string("open() do io\n$(sp)a\n$(sp)end") == "open() do io\n    a\nend"
@@ -768,9 +766,7 @@ end
             @test format_string("a $(d)+\n$(sp)b") == "a $(d)+\n    b"
             @test format_string("a $(d)+ b $(d)*\n$(sp)c") == "a $(d)+ b $(d)*\n    c"
             @test format_string("a $(d)+\n$(sp)b $(d)*\n$(sp)c") == "a $(d)+\n    b $(d)*\n    c"
-            if !(VERSION < v"1.7" && d == ".")
-                @test format_string("a $(d)||\n$(sp)b") == "a $(d)||\n    b"
-            end
+            @test format_string("a $(d)||\n$(sp)b") == "a $(d)||\n    b"
         end
         # assignment
         for nl in ("\n", "\n\n")
@@ -1070,20 +1066,18 @@ end
         # try-finally-catch(err)-end
         @test format_string("try$(d)x$(d)finally$(d)y$(d)catch err$(d)z$(d)end") ==
             "try\n    x\nfinally\n    y\ncatch err\n    z\nend"
-        if VERSION >= v"1.8"
-            # try-catch-else-end
-            @test format_string("try$(d)x$(d)catch\ny$(d)else$(d)z$(d)end") ==
-                "try\n    x\ncatch\n    y\nelse\n    z\nend"
-            # try-catch(err)-else-end
-            @test format_string("try$(d)x$(d)catch err$(d)y$(d)else$(d)z$(d)end") ==
-                "try\n    x\ncatch err\n    y\nelse\n    z\nend"
-            # try-catch-else-finally-end
-            @test format_string("try$(d)x$(d)catch\ny$(d)else$(d)z$(d)finally$(d)z$(d)end") ==
-                "try\n    x\ncatch\n    y\nelse\n    z\nfinally\n    z\nend"
-            # try-catch(err)-else-finally-end
-            @test format_string("try$(d)x$(d)catch err$(d)y$(d)else$(d)z$(d)finally$(d)z$(d)end") ==
-                "try\n    x\ncatch err\n    y\nelse\n    z\nfinally\n    z\nend"
-        end
+        # try-catch-else-end
+        @test format_string("try$(d)x$(d)catch\ny$(d)else$(d)z$(d)end") ==
+            "try\n    x\ncatch\n    y\nelse\n    z\nend"
+        # try-catch(err)-else-end
+        @test format_string("try$(d)x$(d)catch err$(d)y$(d)else$(d)z$(d)end") ==
+            "try\n    x\ncatch err\n    y\nelse\n    z\nend"
+        # try-catch-else-finally-end
+        @test format_string("try$(d)x$(d)catch\ny$(d)else$(d)z$(d)finally$(d)z$(d)end") ==
+            "try\n    x\ncatch\n    y\nelse\n    z\nfinally\n    z\nend"
+        # try-catch(err)-else-finally-end
+        @test format_string("try$(d)x$(d)catch err$(d)y$(d)else$(d)z$(d)finally$(d)z$(d)end") ==
+            "try\n    x\ncatch err\n    y\nelse\n    z\nfinally\n    z\nend"
         # do-end
         @test format_string("open() do\na$(d)end") == "open() do\n    a\nend"
         @test format_string("open() do\nend") == "open() do\nend"