diff --git a/src/Validus/Core.fs b/src/Validus/Core.fs
index c7c1005..a2a5392 100644
--- a/src/Validus/Core.fs
+++ b/src/Validus/Core.fs
@@ -49,6 +49,7 @@ module ValidationMessages =
     let seqEmpty field = sprintf "'%s' must be empty" field
     let seqEqualsLen field len = sprintf "'%s' must be %i items" field len
     let seqExists field = sprintf "'%s' must contain the specified item" field
+    let seqForAll field = sprintf "'%s' must only contain items that satisfy the predicate" field
     let seqGreaterThanLen field min = sprintf "'%s' must be greater than %i items" field min
     let seqGreaterThanOrEqualToLen field min = sprintf "'%s' must be greater than or equal to %i items" field min
     let seqLessThanLen field max = sprintf "'%s' must be less than %i items" field max
@@ -209,9 +210,8 @@ module Validator =
         (rule : 'a -> bool)
         : Validator<'a, 'a> =
         fun (field : string) (value : 'a) ->
-            let error = ValidationErrors.create field [ message field ]
             if rule value then Ok value
-            else error |> Error
+            else [ message field ] |> ValidationErrors.create field |> Error
 
     let success : Validator<'a, 'a> = fun field x -> Ok x
     let fail msg : Validator<'a, 'a> = fun field x -> Error (ValidationErrors.create field [ msg field ])
diff --git a/src/Validus/Validators.Default.fs b/src/Validus/Validators.Default.fs
index 3a8d5df..645ea36 100644
--- a/src/Validus/Validators.Default.fs
+++ b/src/Validus/Validators.Default.fs
@@ -38,7 +38,7 @@ type DefaultComparisonValidator<'a when 'a
     /// error message
     member _.greaterThanOrEqualTo (min : 'a) (field : string) (input : 'a) =
         let msg field = ValidationMessages.greaterThanOrEqualTo field min
-        x.greaterThan min msg field input
+        x.greaterThanOrEqualTo min msg field input
 
     /// Value is less than provided max with the default error message
     member _.lessThan (max : 'a) (field : string) (input : 'a) =
@@ -49,7 +49,7 @@ type DefaultComparisonValidator<'a when 'a
     /// error message
     member _.lessThanOrEqualTo (max : 'a) (field : string) (input : 'a) =
         let msg field = ValidationMessages.lessThanOrEqualTo field max
-        x.lessThan max msg field input
+        x.lessThanOrEqualTo max msg field input
 
 type DefaultStringValidator(x : StringValidator) =
     inherit DefaultEqualityValidator<string>(x)
@@ -81,7 +81,7 @@ type DefaultStringValidator(x : StringValidator) =
     /// value with the default error message
     member _.greaterThanOrEqualToLen (min : int) (field : string) (input : string) =
         let msg field = ValidationMessages.strGreaterThanOrEqualToLen field min
-        x.greaterThanLen min msg field input
+        x.greaterThanOrEqualToLen min msg field input
 
     /// Validate string length is less than provided value with the
     /// default error message
@@ -93,7 +93,7 @@ type DefaultStringValidator(x : StringValidator) =
     /// with the default error message
     member _.lessThanOrEqualToLen (max : int) (field : string) (input : string) =
         let msg field = ValidationMessages.strLessThanOrEqualToLen field max
-        x.lessThanLen max msg field input
+        x.lessThanOrEqualToLen max msg field input
 
     /// Validate string is not null or "" with the default error message
     member _.notEmpty (field : string) (input : string) =
@@ -173,6 +173,11 @@ type DefaultSequenceValidator<'a, 'b when 'a : equality and 'b :> 'a seq>(x : Se
         let msg field = ValidationMessages.seqExists field
         x.exists predicate msg field input
 
+    /// Validate all elements in a sequence satisfiy the predicate
+    member _.forAll (predicate : 'a -> bool) (field: string) (input : 'b) =
+        let msg field = ValidationMessages.seqForAll field
+        x.forAll predicate msg field input
+
     /// Validate sequence length is greater than provided value with the
     /// default error message
     member _.greaterThanLen (min : int) (field : string) (input : 'b) =
@@ -183,7 +188,7 @@ type DefaultSequenceValidator<'a, 'b when 'a : equality and 'b :> 'a seq>(x : Se
     /// value with the default error message
     member _.greaterThanOrEqualToLen (min : int) (field : string) (input : 'b) =
         let msg field = ValidationMessages.seqGreaterThanOrEqualToLen field min
-        x.greaterThanLen min msg field input
+        x.greaterThanOrEqualToLen min msg field input
 
     /// Validate sequence length is less than provided value with the
     /// default error message
@@ -195,7 +200,7 @@ type DefaultSequenceValidator<'a, 'b when 'a : equality and 'b :> 'a seq>(x : Se
     /// with the default error message
     member _.lessThanOrEqualToLen (max : int) (field : string) (input : 'b) =
         let msg field = ValidationMessages.seqLessThanOrEqualToLen field max
-        x.lessThanLen max msg field input
+        x.lessThanOrEqualToLen max msg field input
 
     /// Validate sequence is not null or "" with the default error message
     member _.notEmpty (field : string) (input : 'b) =
diff --git a/src/Validus/Validators.fs b/src/Validus/Validators.fs
index afff644..66d3a16 100644
--- a/src/Validus/Validators.fs
+++ b/src/Validus/Validators.fs
@@ -273,6 +273,15 @@ type SequenceValidator<'a, 'b when 'a : equality and 'b :> 'a seq>() =
         : ValidationResult<'b> =
         Validator.create message (Seq.exists predicate) field input
 
+    /// Validate all elements in a sequence satisfiy the predicate
+    member _.forAll
+        (predicate : 'a -> bool)
+        (message : ValidationMessage)
+        (field : string)
+        (input : 'b)
+        : ValidationResult<'b> =
+        Validator.create message (Seq.forall predicate) field input
+
     /// Validate sequence length is greater than provided value
     member _.greaterThanLen
         (min : int)
diff --git a/test/Validus.Tests/SequenceValidatorTests.fs b/test/Validus.Tests/SequenceValidatorTests.fs
index 73b091b..8d638f1 100644
--- a/test/Validus.Tests/SequenceValidatorTests.fs
+++ b/test/Validus.Tests/SequenceValidatorTests.fs
@@ -103,3 +103,15 @@ let ``(TestValidator.notEmpty) should produce Error`` () =
     match TestValidator.notEmpty "Test" empty with
     | Ok _ -> false
     | Error _ -> true
+
+[<Property>]
+let ``(TestValidator.forAll) should produce Success`` () =
+    match TestValidator.forAll (fun number -> number <= 10) "Test" testSequence with
+    | Ok _ -> true
+    | Error _ -> false
+
+[<Property>]
+let ``(TestValidator.forAll) should produce Error`` () =
+    match TestValidator.forAll (fun number -> number % 2 = 0) "Test" testSequence with
+    | Ok _ -> false
+    | Error _ -> true