diff --git a/spec/cache_hash_spec.cr b/spec/cache_hash_spec.cr
index 8b2c475..d93acb6 100644
--- a/spec/cache_hash_spec.cr
+++ b/spec/cache_hash_spec.cr
@@ -167,12 +167,12 @@ describe CacheHash do
     it "returns a time if the kv pair is not stale" do
       hash = CacheHash(String).new(Time::Span.new(0, 0, 3))
 
-      t = Time.now
+      t = Time.utc
       hash.set "city_1", "Seattle"
       hash.time("city_1").class.should eq(Time)
 
       city_1_time = hash.time("city_1").not_nil!
-      (city_1_time > t && city_1_time < Time.now).should be_true
+      (city_1_time > t && city_1_time < Time.utc).should be_true
     end
 
     it "delete the kv pair if it is stale" do
diff --git a/src/cache_hash.cr b/src/cache_hash.cr
index f8e32fd..c017b28 100644
--- a/src/cache_hash.cr
+++ b/src/cache_hash.cr
@@ -6,7 +6,7 @@ class CacheHash(V)
 
   def get(key : String)
     if cached_time = @time_hash[key]?
-      if cached_time > Time.now - @cache_time_span
+      if cached_time > Time.utc - @cache_time_span
         @kv_hash[key]
       else
         delete key
@@ -19,7 +19,7 @@ class CacheHash(V)
     if val.nil?
       delete key
     else
-      @time_hash[key] = Time.now
+      @time_hash[key] = Time.utc
       @kv_hash[key] = val
     end
   end
@@ -33,7 +33,7 @@ class CacheHash(V)
   def purge_stale
     @kv_hash.each_key do |key|
       if cached_time = @time_hash[key]?
-        delete key unless cached_time > Time.now - @cache_time_span
+        delete key unless cached_time > Time.utc - @cache_time_span
       end
     end
   end
@@ -51,7 +51,7 @@ class CacheHash(V)
 
   def fresh?(key : String)
     if cached_time = @time_hash[key]?
-      if cached_time > Time.now - @cache_time_span
+      if cached_time > Time.utc - @cache_time_span
         true
       else
         delete key
@@ -64,7 +64,7 @@ class CacheHash(V)
 
   def time(key : String)
     if cached_time = @time_hash[key]?
-      if cached_time > Time.now - @cache_time_span
+      if cached_time > Time.utc - @cache_time_span
         cached_time
       else
         delete key
@@ -74,8 +74,8 @@ class CacheHash(V)
 
   def refresh(key : String)
     if cached_time = @time_hash[key]?
-      if cached_time > Time.now - @cache_time_span
-        @time_hash[key] = Time.now
+      if cached_time > Time.utc - @cache_time_span
+        @time_hash[key] = Time.utc
         @kv_hash[key]
       else
         delete key