diff --git a/debug_toolbar/panels/sql/panel.py b/debug_toolbar/panels/sql/panel.py
index afc2d2785..94f22ff2b 100644
--- a/debug_toolbar/panels/sql/panel.py
+++ b/debug_toolbar/panels/sql/panel.py
@@ -55,7 +55,7 @@ class SQLPanel(Panel):
     """
     def __init__(self, *args, **kwargs):
         super(SQLPanel, self).__init__(*args, **kwargs)
-        self._offset = dict((k, len(connections[k].queries)) for k in connections)
+        self._offset = {k: len(connections[k].queries) for k in connections}
         self._sql_time = 0
         self._num_queries = 0
         self._queries = []
@@ -212,14 +212,14 @@ def generate_stats(self, request, response):
         # Queries are duplicates only if there's as least 2 of them.
         # Also, to hide queries, we need to give all the duplicate groups an id
         query_colors = contrasting_color_generator()
-        query_duplicates = dict(
-            (alias, dict(
-                (query, (duplicate_count, next(query_colors)))
+        query_duplicates = {
+            alias: {
+                query: (duplicate_count, next(query_colors))
                 for query, duplicate_count in queries.items()
                 if duplicate_count >= 2
-            ))
+            }
             for alias, queries in query_duplicates.items()
-        )
+        }
 
         for alias, query in self._queries:
             try:
diff --git a/debug_toolbar/panels/sql/tracking.py b/debug_toolbar/panels/sql/tracking.py
index 46158cc90..c619bba9a 100644
--- a/debug_toolbar/panels/sql/tracking.py
+++ b/debug_toolbar/panels/sql/tracking.py
@@ -91,8 +91,7 @@ def _quote_params(self, params):
         if not params:
             return params
         if isinstance(params, dict):
-            return dict((key, self._quote_expr(value))
-                        for key, value in params.items())
+            return {key: self._quote_expr(value) for key, value in params.items()}
         return list(map(self._quote_expr, params))
 
     def _decode(self, param):
diff --git a/debug_toolbar/utils.py b/debug_toolbar/utils.py
index 88138bc19..8b66a446c 100644
--- a/debug_toolbar/utils.py
+++ b/debug_toolbar/utils.py
@@ -72,7 +72,7 @@ def render_stacktrace(trace):
     stacktrace = []
     for frame in trace:
         params = map(escape, frame[0].rsplit(os.path.sep, 1) + list(frame[1:]))
-        params_dict = dict((six.text_type(idx), v) for idx, v in enumerate(params))
+        params_dict = {six.text_type(idx): v for idx, v in enumerate(params)}
         try:
             stacktrace.append('<span class="djdt-path">%(0)s/</span>'
                               '<span class="djdt-file">%(1)s</span>'