diff --git a/README.md b/README.md
index 4bd520f..86c18df 100644
--- a/README.md
+++ b/README.md
@@ -112,7 +112,7 @@ In no particular order, features that have been implemented and are planned:
     - [ ] Shared examples - `behaves_like`, `include_examples`
 - [ ] Matchers
     - [X] Equality matchers - `eq`, `ne`, `be ==`, `be !=`
-    - [ ] Comparison matchers - `lt`, `le`, `gt`, `ge`, `be <`, `be <=`, `be >`, `be >=`, `be_within[.of]`, `be_close`
+    - [X] Comparison matchers - `lt`, `le`, `gt`, `ge`, `be <`, `be <=`, `be >`, `be >=`, `be_within[.of]`, `be_close`
     - [ ] Type matchers - `be_a`, `respond_to`
     - [ ] Collection matchers - `contain`, `have`, `contain_exactly[.in_order|.in_any_order]`, `match_array[.in_order|.in_any_order]`, `start_with`, `end_with`, `be_empty`, `has_key`, `has_value`, `all`, `all_satisfy`
     - [X] Truthy matchers - `be`, `be_true`, `be_truthy`, `be_false`, `be_falsey`, `be_nil`
diff --git a/src/spectator/dsl/matcher_dsl.cr b/src/spectator/dsl/matcher_dsl.cr
index 1ab1bcf..9a6f427 100644
--- a/src/spectator/dsl/matcher_dsl.cr
+++ b/src/spectator/dsl/matcher_dsl.cr
@@ -263,6 +263,21 @@ module Spectator::DSL
       )
     end
 
+    # Indicates that some value should be within a delta of an expected value.
+    #
+    # Example:
+    # ```
+    # expect(pi).to be_close(3.14159265359, 0.0000001)
+    # ```
+    #
+    # This is functionly equivalent to:
+    # ```
+    # be_within(expected).of(delta)
+    # ```
+    macro be_close(expected, delta)
+      be_within({{delta}}).of({{expected}})
+    end
+
     # Indicates that some value should or should not be nil.
     #
     # Examples: