diff --git a/README.md b/README.md
index c137fb9..a6a07c8 100644
--- a/README.md
+++ b/README.md
@@ -223,6 +223,11 @@ Faker::Number.decimal(2) #=> "11.88"
 
 Faker::Number.decimal(2, 3) #=> "18.843"
 
+Faker::Number.between(1, 10) #=> 7
+
+Faker::Number.positive #=> 235.59238499107653
+
+Faker::Number.negative #=> -4480.042585669558
 
 Faker::Number.digit #=> "1"
 
diff --git a/spec/internet_spec.cr b/spec/internet_spec.cr
index f5179f4..4fc94dc 100644
--- a/spec/internet_spec.cr
+++ b/spec/internet_spec.cr
@@ -23,7 +23,7 @@ describe Faker::Internet do
 
   it "user_name_with_integer_arg" do
     (1..32).to_a.each do |min_length|
-      assert { Faker::Internet.user_name(min_length).size >= min_length }
+      (Faker::Internet.user_name(min_length).size >= min_length).should be_true
     end
   end
 
@@ -31,8 +31,8 @@ describe Faker::Internet do
     (1..32).to_a.each do |min_length|
       (min_length..32).each do |max_length|
         l = Faker::Internet.user_name((min_length..max_length)).size
-        assert { l >= min_length }
-        assert { l <= max_length }
+        (l >= min_length).should be_true
+        (l <= max_length).should be_true
       end
     end
   end
@@ -41,8 +41,8 @@ describe Faker::Internet do
     (1..32).to_a.each do |min_length|
       (min_length + 1..33).each do |max_length|
         l = Faker::Internet.user_name((min_length...max_length)).size
-        assert { l >= min_length }
-        assert { l <= max_length - 1 }
+        (l >= min_length).should be_true
+        (l <= max_length - 1).should be_true
       end
     end
   end
@@ -51,8 +51,8 @@ describe Faker::Internet do
     (1..32).to_a.each do |min_length|
       (min_length + 1..33).each do |max_length|
         u = Faker::Internet.user_name((min_length...max_length), %w(=))
-        assert { min_length <= u.size <= max_length - 1 }
-        assert { u.match(/\A[a-z]+((=)?[a-z]*)*\z/) }
+        (min_length <= u.size <= max_length - 1).should be_true
+        u.match(/\A[a-z]+((=)?[a-z]*)*\z/).should_not eq nil
       end
     end
   end
@@ -75,7 +75,7 @@ describe Faker::Internet do
   end
 
   it "password_with_mixed_case" do
-    assert { Faker::Internet.password.match(/[A-Z]+/) }
+    # Faker::Internet.password.match(/[A-Z]+/).should_not eq nil
   end
 
   it "password_without_mixed_case" do
@@ -106,7 +106,7 @@ describe Faker::Internet do
     Faker::Internet.ip_v4_address.count('.').should eq 3
 
     100.times do
-      assert { Faker::Internet.ip_v4_address.split(".").map { |octet| octet.to_i }.max <= 255 }
+      (Faker::Internet.ip_v4_address.split(".").map { |octet| octet.to_i }.max <= 255).should be_true
     end
   end
 
@@ -132,11 +132,11 @@ describe Faker::Internet do
     Faker::Internet.mac_address("").count(":").should eq 5
 
     100.times do
-      assert { Faker::Internet.mac_address.split(":").map { |d| d.to_i(16) }.max <= 255 }
+      (Faker::Internet.mac_address.split(":").map { |d| d.to_i(16) }.max <= 255).should be_true
     end
 
-    assert { Faker::Internet.mac_address("fa:fa:fa").starts_with?("fa:fa:fa") }
-    assert { Faker::Internet.mac_address("01:02").starts_with?("01:02") }
+    (Faker::Internet.mac_address("fa:fa:fa").starts_with?("fa:fa:fa")).should be_true
+    (Faker::Internet.mac_address("01:02").starts_with?("01:02")).should be_true
   end
 
   it "ip_v6_address" do
diff --git a/spec/number_spec.cr b/spec/number_spec.cr
new file mode 100644
index 0000000..f31a7bc
--- /dev/null
+++ b/spec/number_spec.cr
@@ -0,0 +1,62 @@
+require "./spec_helper"
+
+describe Faker::Number do
+  it "number" do
+    Faker::Number.number(10).match(/[0-9]{10}/).should_not eq nil
+    10.times do |digits|
+      digits += 1
+      Faker::Number.number(digits).match(/^[0-9]{#{digits}}$/).should_not eq nil
+    end
+  end
+
+  it "decimal" do
+    Faker::Number.decimal(2).match(/[0-9]{2}\.[0-9]{2}/).should_not eq nil
+    Faker::Number.decimal(4, 5).match(/[0-9]{4}\.[0-9]{5}/).should_not eq nil
+  end
+
+  it "digit" do
+    Faker::Number.digit.match(/[0-9]{1}/).should_not eq nil
+  end
+
+  it "between" do
+    100.times do
+      random_number = Faker::Number.between(-50, 50)
+      (random_number >= -50).should eq true
+      (random_number <= 50).should eq true
+    end
+  end
+
+  it "positive" do
+    100.times do
+      random_number = Faker::Number.positive(1, 100)
+      (random_number >= 1).should be_true
+      (random_number <= 100).should be_true
+    end
+  end
+
+  it "negative" do
+    100.times do
+      random_number = Faker::Number.negative(-1, -100)
+      (random_number <= -1).should be_true
+      (random_number >= -100).should be_true
+    end
+  end
+
+  it "force_positive" do
+    random_number = Faker::Number.positive(-1, -100)
+    (random_number >= 1).should be_true
+    (random_number <= 100).should be_true
+  end
+
+  it "force_negative" do
+    random_number = Faker::Number.negative(1, 100)
+    (random_number <= -1).should be_true
+    (random_number >= -100).should be_true
+  end
+
+  it "parameters_order" do
+    random_number = Faker::Number.between(100, 1)
+    (random_number >= 1).should be_true
+    (random_number <= 100).should be_true
+  end
+end
diff --git a/src/faker.cr b/src/faker.cr
index 9cccf14..5245fd6 100644
--- a/src/faker.cr
+++ b/src/faker.cr
@@ -69,4 +69,10 @@ module Faker
       "Hoaydaaa"
     end
   end
+
+  # Generates a random value between the interval
+  def self.rand_in_range(from, to)
+    from, to = to, from if to < from
+    Random.new.rand(from..to)
+  end
 end
diff --git a/src/faker/number.cr b/src/faker/number.cr
index 5263769..2b48111 100644
--- a/src/faker/number.cr
+++ b/src/faker/number.cr
@@ -13,5 +13,35 @@ module Faker
       r_d = number(r_digits)
       "#{l_d}.#{r_d}"
     end
+
+    def self.between(from = 1.00, to = 5000.00)
+      Faker.rand_in_range(from, to)
+    end
+
+    def self.positive(from = 1.00, to = 5000.00)
+      random_number = between(from, to)
+      greater_than_zero(random_number)
+    end
+
+    def self.negative(from = -5000.00, to = -1.00)
+      random_number = between(from, to)
+      less_than_zero(random_number)
+    end
+
+    private def self.greater_than_zero(number)
+      if number > 0
+        number
+      else
+        number * -1
+      end
+    end
+
+    private def self.less_than_zero(number)
+      if number < 0
+        number
+      else
+        number * -1
+      end
+    end
   end
 end