diff --git a/lib/knapsack.rb b/lib/knapsack.rb
index 9f14943..22c920a 100644
--- a/lib/knapsack.rb
+++ b/lib/knapsack.rb
@@ -48,7 +48,7 @@ def load_tasks
     def logger
       return @@logger if @@logger
       log = Knapsack::Logger.new
-      log.level = Knapsack::Logger::INFO
+      log.level = Knapsack::Config::Env.log_level
       @@logger = log
     end
 
diff --git a/lib/knapsack/config/env.rb b/lib/knapsack/config/env.rb
index b1bd75a..3e42c7f 100644
--- a/lib/knapsack/config/env.rb
+++ b/lib/knapsack/config/env.rb
@@ -22,6 +22,14 @@ def test_dir
           ENV['KNAPSACK_TEST_DIR']
         end
 
+        def log_level
+          {
+            "debug" => Knapsack::Logger::DEBUG,
+            "info"  => Knapsack::Logger::INFO,
+            "warn"  => Knapsack::Logger::WARN,
+          }[ENV['KNAPSACK_LOG_LEVEL']] || Knapsack::Logger::INFO
+        end
+
         private
 
         def index_starting_from_one(index)
diff --git a/spec/knapsack/config/env_spec.rb b/spec/knapsack/config/env_spec.rb
index 59f4695..8115d96 100644
--- a/spec/knapsack/config/env_spec.rb
+++ b/spec/knapsack/config/env_spec.rb
@@ -110,4 +110,18 @@
       it { should be_nil }
     end
   end
+
+  describe '.log_level' do
+    subject { described_class.log_level }
+
+    context 'when ENV exists' do
+      let(:log_level) { 'debug' }
+      before { stub_const("ENV", { 'KNAPSACK_LOG_LEVEL' => log_level }) }
+      it { should eql Knapsack::Logger::DEBUG }
+    end
+
+    context "when ENV doesn't exist" do
+      it { should eql Knapsack::Logger::INFO }
+    end
+  end
 end