diff --git a/.tool-versions b/.tool-versions
index a669ba3..f8cac81 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-crystal 1.7.3
+crystal 1.10.0
diff --git a/shard.yml b/shard.yml
index bb466be..e683f74 100644
--- a/shard.yml
+++ b/shard.yml
@@ -17,6 +17,6 @@ targets:
   fincher:
     main: src/cli.cr
 
-crystal: 1.7.3
+crystal: ">= 1.8.0"
 
 license: MIT
diff --git a/src/fincher/io_scanner.cr b/src/fincher/io_scanner.cr
index e450d5c..29952d2 100644
--- a/src/fincher/io_scanner.cr
+++ b/src/fincher/io_scanner.cr
@@ -59,11 +59,11 @@ module Fincher
     end
 
     def check(pattern)
-      match(pattern, advance: false, options: Regex::Options::ANCHORED)
+      match(pattern, advance: false, options: Regex::MatchOptions::ANCHORED)
     end
 
     def check_until(pattern)
-      match(pattern, advance: false, options: Regex::Options::None)
+      match(pattern, advance: false, options: Regex::MatchOptions::None)
     end
 
     def skip(bytes_count : Int)
@@ -81,11 +81,11 @@ module Fincher
     end
 
     def scan(pattern)
-      match(pattern, advance: true, options: Regex::Options::ANCHORED)
+      match(pattern, advance: true, options: Regex::MatchOptions::ANCHORED)
     end
 
     def scan_until(pattern)
-      match(pattern, advance: true, options: Regex::Options::None)
+      match(pattern, advance: true, options: Regex::MatchOptions::None)
     end
 
     def offset
@@ -194,7 +194,7 @@ module Fincher
       last_match_str
     end
 
-    private def buffer_match(pattern, advance = true, options = Regex::Options::ANCHORED)
+    private def buffer_match(pattern, advance = true, options = Regex::MatchOptions::ANCHORED)
       match = pattern.match_at_byte_index(@buffer, @buffer_cursor, options)
       if match
         start = @buffer_cursor