diff --git a/hy/cmdline.py b/hy/cmdline.py
index fb58539..c88ec32 100644
--- a/hy/cmdline.py
+++ b/hy/cmdline.py
@@ -11,7 +11,7 @@ import sys
 import os
 import importlib
 
-import astor.codegen
+import astor.code_gen
 
 import hy
 
@@ -413,17 +413,17 @@ def hy2py_main():
             else pretty_error(import_buffer_to_ast, stdin_text, module_name))
     if options.with_ast:
         if PY3 and platform.system() == "Windows":
-            _print_for_windows(astor.dump(_ast))
+            _print_for_windows(astor.dump_tree(_ast))
         else:
-            print(astor.dump(_ast))
+            print(astor.dump_tree(_ast))
         print()
         print()
 
     if not options.without_python:
         if PY3 and platform.system() == "Windows":
-            _print_for_windows(astor.codegen.to_source(_ast))
+            _print_for_windows(astor.code_gen.to_source(_ast))
         else:
-            print(astor.codegen.to_source(_ast))
+            print(astor.code_gen.to_source(_ast))
 
     parser.exit(0)
 
diff --git a/hy/core/language.hy b/hy/core/language.hy
index a939edc..91ecb7b 100644
--- a/hy/core/language.hy
+++ b/hy/core/language.hy
@@ -79,9 +79,9 @@ If the second argument `codegen` is true, generate python code instead."
   (spoof-positions tree)
   (setv compiled (hy.compiler.hy-compile tree (calling-module-name)))
   ((if codegen
-            astor.codegen.to_source
-            astor.dump)
-          compiled))
+       astor.code-gen.to-source
+       astor.dump-tree)
+    compiled))
 
 (defn distinct [coll]
   "Return a generator from the original collection `coll` with no duplicates."
diff --git a/setup.py b/setup.py
index f0445bd..72ee75e 100755
--- a/setup.py
+++ b/setup.py
@@ -30,7 +30,7 @@ class Install(install):
                         "." + filename[:-len(".hy")])
         install.run(self)
 
-install_requires = ['rply>=0.7.5', 'astor>=0.5', 'clint>=0.4']
+install_requires = ['rply>=0.7.5', 'astor>=0.6', 'clint>=0.4']
 if os.name == 'nt':
     install_requires.append('pyreadline>=2.1')
 
diff --git a/tests/native_tests/native_macros.hy b/tests/native_tests/native_macros.hy
index d3efcb6..1ef274d 100644
--- a/tests/native_tests/native_macros.hy
+++ b/tests/native_tests/native_macros.hy
@@ -144,7 +144,7 @@
 
 (defn test-gensym-in-macros []
   (import ast)
-  (import [astor.codegen [to_source]])
+  (import [astor.code-gen [to-source]])
   (import [hy.importer [import_buffer_to_ast]])
   (setv macro1 "(defmacro nif [expr pos zero neg]
       (setv g (gensym))
@@ -170,7 +170,7 @@
 
 (defn test-with-gensym []
   (import ast)
-  (import [astor.codegen [to_source]])
+  (import [astor.code-gen [to-source]])
   (import [hy.importer [import_buffer_to_ast]])
   (setv macro1 "(defmacro nif [expr pos zero neg]
       (with-gensyms [a]
@@ -194,7 +194,7 @@
 
 (defn test-defmacro-g! []
   (import ast)
-  (import [astor.codegen [to_source]])
+  (import [astor.code-gen [to-source]])
   (import [hy.importer [import_buffer_to_ast]])
   (setv macro1 "(defmacro/g! nif [expr pos zero neg]
         `(do
@@ -223,7 +223,7 @@
 (defn test-defmacro! []
   ;; defmacro! must do everything defmacro/g! can
   (import ast)
-  (import [astor.codegen [to_source]])
+  (import [astor.code-gen [to-source]])
   (import [hy.importer [import_buffer_to_ast]])
   (setv macro1 "(defmacro! nif [expr pos zero neg]
         `(do
diff --git a/tests/test_bin.py b/tests/test_bin.py
index 0b2a0ad..3b28e0d 100644
--- a/tests/test_bin.py
+++ b/tests/test_bin.py
@@ -72,7 +72,7 @@ def test_bin_hy_stdin():
 
     output, _ = run_cmd("hy --spy", '(koan)')
     assert "monk" in output
-    assert "\\n  Ummon" in output
+    assert "\n  Ummon" in output
 
     # --spy should work even when an exception is thrown
     output, _ = run_cmd("hy --spy", '(foof)')
@@ -195,7 +195,7 @@ def test_bin_hy_icmd_file():
 
 def test_bin_hy_icmd_and_spy():
     output, _ = run_cmd("hy -i \"(+ [] [])\" --spy", "(+ 1 1)")
-    assert "([] + [])" in output
+    assert "[] + []" in output
 
 
 def test_bin_hy_missing_file():