diff --git a/main.py b/main.py
index 43468da..d4b1711 100644
--- a/main.py
+++ b/main.py
@@ -17,6 +17,7 @@ from sonarr import (
     get_episodes_for_series,
     get_history_for_episode,
     get_series,
+    set_concurrency_limit,
 )
 
 logger: structlog.stdlib.AsyncBoundLogger = get_async_logger()
@@ -31,15 +32,14 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
     episodes = await get_episodes_for_series(client, series_id)
     indexer_counts: Dict[str, int] = defaultdict(lambda: 0)
 
-    for ep in episodes:
+    # Process episodes in parallel for this series
+    async def process_episode(ep):
+        nonlocal indexer_counts
         # Skip episodes without files
         if not ep.get("hasFile", False):
-            continue
-
+            return
         indexer = "unknown"
         episode_detail = f"{ellipsis(series['title'], 12)} S{ep['seasonNumber']:02}E{ep['episodeNumber']:02} - {ellipsis(ep.get('title', 'Unknown'), 18)}"
-
-        # Retrieves all history events for the episode
         try:
             history = await get_history_for_episode(client, ep["id"])
         except Exception as e:
@@ -52,7 +52,7 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
                     episode_id=ep["id"],
                     episode=episode_detail,
                 )
-                continue
+                return
             else:
                 await logger.error(
                     "Error fetching history for episode",
@@ -60,9 +60,7 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
                     episode=episode_detail,
                     error=str(e),
                 )
-                continue
-
-        # Get the episode's episodeFileId
+                return
         target_file_id = ep.get("episodeFileId")
         if not target_file_id:
             await logger.error(
@@ -70,7 +68,7 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
                 episode_id=ep["id"],
                 episode=episode_detail,
             )
-            continue
+            return
 
         # Find the 'downloadFolderImported' event with the matching data.fileId
         def is_import_event(event: Dict, file_id: int) -> bool:
@@ -93,7 +91,7 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
                 episode=episode_detail,
                 target_file_id=target_file_id,
             )
-            continue
+            return
 
         # Acquire the event's downloadId
         download_id = import_event.get("downloadId")
@@ -104,7 +102,7 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
                 episode=episode_detail,
                 target_file_id=target_file_id,
             )
-            continue
+            return
 
         # Find the 'grabbed' event with the matching downloadId
         def is_grabbed_event(event: Dict, download_id: str) -> bool:
@@ -128,7 +126,7 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
                 download_id=ellipsis(download_id, 20),
                 episode=episode_detail,
             )
-            continue
+            return
 
         # Extract the indexer from the 'grabbed' event
         indexer = grabbed_event.get("data", {}).get("indexer")
@@ -147,6 +145,10 @@ async def process_series(client, series_id: int) -> Dict[str, int]:
 
         indexer_counts[indexer] += 1
 
+    async with anyio.create_task_group() as tg:
+        for ep in episodes:
+            tg.start_soon(process_episode, ep)
+
     return indexer_counts
 
 
@@ -167,6 +169,8 @@ async def main():
             "AUTHELIA_USERNAME and AUTHELIA_PASSWORD must be set in the .env file."
         )
 
+    set_concurrency_limit(25)  # Set the max number of concurrent Sonarr API requests
+
     # Request counter setup
     request_counter = {"count": 0, "active": 0}
     counter_lock = anyio.Lock()
diff --git a/sonarr.py b/sonarr.py
index 3f050d7..4cb93b0 100644
--- a/sonarr.py
+++ b/sonarr.py
@@ -2,43 +2,53 @@ import httpx
 from config import SONARR_URL, SONARR_API_KEY, logger
 
 
+# Add a global semaphore for concurrency limiting
+semaphore = None
+
+
+async def with_limit(coro):
+    global semaphore
+    if semaphore is None:
+        raise RuntimeError(
+            "Semaphore not initialized. Call set_concurrency_limit first."
+        )
+    async with semaphore:
+        return await coro
+
+
+def set_concurrency_limit(limit: int):
+    global semaphore
+    import anyio
+
+    semaphore = anyio.Semaphore(limit)
+
+
 async def get_all_series(client: httpx.AsyncClient):
-    """
-    Fetch all series from Sonarr.
-    """
-    url = f"{SONARR_URL}/api/v3/series"
-    resp = await client.get(url)
+    resp = await with_limit(client.get(f"{SONARR_URL}/api/v3/series"))
     resp.raise_for_status()
     return resp.json()
 
 
 async def get_series(client: httpx.AsyncClient, series_id: int):
-    """
-    Fetch a single series by ID from Sonarr.
-    """
-    url = f"{SONARR_URL}/api/v3/series/{series_id}"
-    resp = await client.get(url)
+    resp = await with_limit(client.get(f"{SONARR_URL}/api/v3/series/{series_id}"))
     resp.raise_for_status()
     return resp.json()
 
 
 async def get_episodes_for_series(client: httpx.AsyncClient, series_id: int):
-    """
-    Fetch all episodes for a given series from Sonarr.
-    """
-    url = f"{SONARR_URL}/api/v3/episode?seriesId={series_id}"
-    resp = await client.get(url)
+    resp = await with_limit(
+        client.get(f"{SONARR_URL}/api/v3/episode?seriesId={series_id}")
+    )
     resp.raise_for_status()
     return resp.json()
 
 
 async def get_history_for_episode(client: httpx.AsyncClient, episode_id: int):
-    """
-    Fetch history for a given episode from Sonarr.
-    """
-    resp = await client.get(
-        SONARR_URL + "/api/v3/history",
-        params={"episodeId": episode_id, "pageSize": 100},
+    resp = await with_limit(
+        client.get(
+            SONARR_URL + "/api/v3/history",
+            params={"episodeId": episode_id, "pageSize": 100},
+        )
     )
     resp.raise_for_status()
     return resp.json()