diff --git a/README.md b/README.md
index 586b637..f2344ef 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,7 @@ backends.
 - `B2_ACCOUNT_ID`: (Optional) Required for Backblaze B2 backend.
 - `B2_ACCOUNT_KEY`: (Optional) Required for Backblaze B2 backend.
 - `REFRESH_INTERVAL`: (Optional) Refresh interval for the metrics in seconds.
-Computing the metrics is a expensive task, keep this value as high as possible.
+Computing the metrics is an expensive task, keep this value as high as possible.
 Default is `60` seconds.
 - `LISTEN_PORT`: (Optional) The address the exporter should listen on. The
 default is `8001`.
@@ -151,7 +151,7 @@ services:
 
 ## Exported metrics
 
-```python
+```bash
 # HELP restic_check_success Result of restic check operation in the repository
 # TYPE restic_check_success gauge
 restic_check_success 1.0
diff --git a/restic-exporter.py b/restic-exporter.py
index 8af8361..af097fa 100644
--- a/restic-exporter.py
+++ b/restic-exporter.py
@@ -79,7 +79,7 @@ class ResticCollector(object):
         )
         scrape_duration_seconds = GaugeMetricFamily(
             "restic_scrape_duration_seconds",
-            "Ammount of time each scrape takes",
+            "Amount of time each scrape takes",
             labels=[],
         )
 
@@ -312,11 +312,13 @@ class ResticCollector(object):
         text_result = result.stdout.decode("utf-8")
         return len(text_result.split("\n")) - 1
 
-    def calc_snapshot_hash(self, snapshot: dict) -> str:
+    @staticmethod
+    def calc_snapshot_hash(snapshot: dict) -> str:
         text = snapshot["hostname"] + snapshot["username"] + ",".join(snapshot["paths"])
         return hashlib.sha256(text.encode("utf-8")).hexdigest()
 
-    def parse_stderr(self, result):
+    @staticmethod
+    def parse_stderr(result):
         return (
             result.stderr.decode("utf-8").replace("\n", " ")
             + " Exit code: "