diff --git a/shard.yml b/shard.yml
index a8f9f66..91d4b23 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,6 +1,6 @@
 name: myst
 version: 0.3.0
-crystal: 0.24.1
+crystal: 0.26.1
 license: MIT
 authors:
   - Jon Egeland <jonegeland@gmail.com>
diff --git a/src/myst/interpreter/native_lib/file.cr b/src/myst/interpreter/native_lib/file.cr
index a162065..1b92f18 100644
--- a/src/myst/interpreter/native_lib/file.cr
+++ b/src/myst/interpreter/native_lib/file.cr
@@ -81,7 +81,11 @@ module Myst
     end
 
     NativeLib.method :static_File_lines, MTValue, file_name : String do
-      TList.new(File.each_line(file_name).map{ |l| l.as(MTValue) }.to_a)
+      lines = File.open(file_name) do |file| 
+        file.each_line.map { |l| l.as(MTValue) }.to_a
+      end
+
+      TList.new(lines)
     end
 
 
diff --git a/src/myst/interpreter/native_lib/time.cr b/src/myst/interpreter/native_lib/time.cr
index e817913..23b6626 100644
--- a/src/myst/interpreter/native_lib/time.cr
+++ b/src/myst/interpreter/native_lib/time.cr
@@ -2,7 +2,7 @@ module Myst
   class Interpreter
     NativeLib.method :static_time_now, MTValue do
       seconds, nanoseconds = Crystal::System::Time.compute_utc_seconds_and_nanoseconds
-      offset = Crystal::System::Time.compute_utc_offset(seconds)
+      offset = Time.new(seconds: seconds, nanoseconds: nanoseconds, location: Time::Location.local).offset
 
       instance = NativeLib.instantiate(self, this.as(TType), [
         seconds + offset,
@@ -18,7 +18,7 @@ module Myst
       if format
        crystal_time.to_s(format)
       else
-       crystal_time.to_s
+       crystal_time.to_s("%Y-%m-%d %H:%M:%S")
       end
     end
 
@@ -35,7 +35,7 @@ module Myst
       Time.new(
         seconds: myst_time.ivars["@seconds"].as(Int64),
         nanoseconds: myst_time.ivars["@nanoseconds"].as(Int64).to_i32,
-        kind: Time::Kind::Unspecified
+        location: Time::Location::UTC
       )
     end
   end