diff --git a/requirements.txt b/requirements.txt
index e69de29..eacf84f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -0,0 +1 @@
+gevent>=1.1.2
diff --git a/setup.py b/setup.py
index 3410335..6d5f9da 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,9 @@
     url='https://github.com/pipermerriam/py-solc',
     include_package_data=True,
     py_modules=['solc'],
-    install_requires=[],
+    install_requires=[
+        "gevent>=1.1.2",
+    ],
     license="MIT",
     zip_safe=False,
     keywords='ethereum solidity solc',
diff --git a/solc/main.py b/solc/main.py
index 835e22c..564f56c 100644
--- a/solc/main.py
+++ b/solc/main.py
@@ -27,8 +27,9 @@
 is_solc_available = functools.partial(is_executable_available, SOLC_BINARY)
 
 
-def get_solc_version():
-    stdoutdata, stderrdata = solc_wrapper(version=True)
+def get_solc_version(**kwargs):
+    kwargs['version'] = True
+    stdoutdata, stderrdata = solc_wrapper(**kwargs)
     version_match = version_regex.search(stdoutdata)
     if version_match is None:
         raise SolcError(
@@ -39,7 +40,7 @@ def get_solc_version():
     return version_match.groups()[0]
 
 
-def _parse_compiler_output(stdoutdata):
+def _parse_compiler_output(stdoutdata, compiler_version):
 
     output = json.loads(stdoutdata)
 
@@ -55,8 +56,6 @@ def _parse_compiler_output(stdoutdata):
 
     sorted_contracts = sorted(contracts.items(), key=lambda c: c[0])
 
-    compiler_version = get_solc_version()
-
     return {
         contract_name: {
             'abi': contract_data['abi'],
@@ -106,7 +105,9 @@ def compile_source(source, output_values=ALL_OUTPUT_VALUES, **kwargs):
         **kwargs
     )
 
-    contracts = _parse_compiler_output(stdoutdata)
+    compiler_version = get_solc_version(version=True, **kwargs)
+
+    contracts = _parse_compiler_output(stdoutdata, compiler_version)
     return contracts
 
 
@@ -128,7 +129,9 @@ def compile_files(source_files, output_values=ALL_OUTPUT_VALUES, **kwargs):
         **kwargs
     )
 
-    contracts = _parse_compiler_output(stdoutdata)
+    compiler_version = get_solc_version(version=True, **kwargs)
+
+    contracts = _parse_compiler_output(stdoutdata, compiler_version)
     return contracts
 
 
diff --git a/solc/wrapper.py b/solc/wrapper.py
index d470057..1d8284c 100644
--- a/solc/wrapper.py
+++ b/solc/wrapper.py
@@ -1,6 +1,7 @@
 from __future__ import absolute_import
 
-import subprocess
+from gevent import subprocess
+
 import textwrap
 
 from .exceptions import (
@@ -44,7 +45,7 @@ def solc_wrapper(solc_binary=SOLC_BINARY,
                  devdoc=None,
                  formal=None,
                  success_return_code=0):
-    command = ['solc']
+    command = [solc_binary]
 
     if help:
         command.append('--help')