diff --git a/setup.py b/setup.py
index 09c966d8..13867017 100644
--- a/setup.py
+++ b/setup.py
@@ -14,6 +14,7 @@
     install_requires=[
         'numpy',
         'pandas',
+        "future-fstrings;python_version<'3.6'",
     ],
     download_url = 'https://github.com/bukosabino/ta/tarball/0.5.18',
     keywords = ['technical analysis', 'python3', 'pandas'],
diff --git a/ta/trend.py b/ta/trend.py
index 9f81917e..fe7e5286 100644
--- a/ta/trend.py
+++ b/ta/trend.py
@@ -1,3 +1,4 @@
+# -*- coding: future_fstrings -*-
 """
 .. module:: trend
    :synopsis: Trend Indicators.
diff --git a/ta/volume.py b/ta/volume.py
index 87ac746e..79da083c 100644
--- a/ta/volume.py
+++ b/ta/volume.py
@@ -1,3 +1,4 @@
+# -*- coding: future_fstrings -*-
 """
 .. module:: volume
    :synopsis: Volume Indicators.
diff --git a/ta/wrapper.py b/ta/wrapper.py
index 285915b0..0a7c4ea6 100644
--- a/ta/wrapper.py
+++ b/ta/wrapper.py
@@ -1,3 +1,4 @@
+# -*- coding: future_fstrings -*-
 """
 .. module:: wrapper
    :synopsis: Wrapper of Indicators.