diff --git a/Dockerfile b/Dockerfile
index 85a7139..b8779f0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,8 +22,7 @@ RUN pip install --upgrade pip && \
  make && \
  make install
 
-RUN git clone https://github.com/MycroftAI/lingua-franca.git
-RUN pip install lingua-franca/
+RUN pip install git+https://github.com/MycroftAI/lingua-franca.git@5bfd75fe5996fd364102a0eec3f714c9ddc9275c
 
 WORKDIR /app
 COPY ./requirements.txt /app
diff --git a/server/server.py b/server/server.py
index c4dda85..ecd5667 100644
--- a/server/server.py
+++ b/server/server.py
@@ -330,7 +330,7 @@ async def details(request: Request):
 def worker(sentence, speaker_id, model, use_aliases, new_speaker_ids):
     def substitute_time(sentence):
         # Regular expression to find time pattern (HH:MM)
-        time_pattern = re.compile(r'(\d{1,2}):(\d{2})')
+        time_pattern = re.compile(r'((?<=\s)\d{1,2}):(\d{2}(?=\s))')
 
         # Find all matches of time pattern in the sentence
         matches = re.findall(time_pattern, sentence)