diff --git a/preprocessors/caption-recognition/Dockerfile b/preprocessors/caption-recognition/Dockerfile
index 243eee9a..d2af434c 100644
--- a/preprocessors/caption-recognition/Dockerfile
+++ b/preprocessors/caption-recognition/Dockerfile
@@ -14,7 +14,7 @@ COPY --chown=python:python . $HOME/app
 COPY /preprocessors/caption-recognition/requirements.txt /app/requirements.txt
 
 RUN pip3 install --upgrade pip
-RUN pip install -r /app/requirements.txt
+RUN pip3 install -r /app/requirements.txt
 
 
 COPY /schemas /app/schemas
diff --git a/preprocessors/clothes-detector/Dockerfile b/preprocessors/clothes-detector/Dockerfile
index 9aecd330..361a9df6 100644
--- a/preprocessors/clothes-detector/Dockerfile
+++ b/preprocessors/clothes-detector/Dockerfile
@@ -20,7 +20,7 @@ RUN apt-get install -y p7zip \
     zip \
     unzip
 RUN pip3 install --upgrade pip
-RUN pip install -r /app/requirements.txt
+RUN pip3 install -r /app/requirements.txt
 RUN wget https://image.a11y.mcgill.ca/models/clothesDetector/yolo.zip
 RUN unzip yolo.zip
 
diff --git a/preprocessors/content-categoriser/Dockerfile b/preprocessors/content-categoriser/Dockerfile
index 1e6b84e2..7f58e549 100644
--- a/preprocessors/content-categoriser/Dockerfile
+++ b/preprocessors/content-categoriser/Dockerfile
@@ -9,7 +9,7 @@ WORKDIR /app
 ENV PATH="/home/python/.local/bin:${PATH}"
 
 RUN pip3 install --upgrade pip
-RUN pip install -r /app/requirements.txt
+RUN pip3 install -r /app/requirements.txt
 
 COPY /schemas /app/schemas
 COPY /preprocessors/content-categoriser/ /app
diff --git a/preprocessors/grouping/Dockerfile b/preprocessors/grouping/Dockerfile
index ff187d3c..3b67e61b 100644
--- a/preprocessors/grouping/Dockerfile
+++ b/preprocessors/grouping/Dockerfile
@@ -4,10 +4,10 @@ RUN adduser --disabled-password python
 WORKDIR /app
 ENV PATH="/home/python/.local/bin:${PATH}"
 
-RUN pip install --upgrade pip
+RUN pip3 install --upgrade pip
 
 COPY /preprocessors/grouping/requirements.txt /app/requirements.txt
-RUN pip install -r requirements.txt
+RUN pip3 install -r requirements.txt
 
 COPY /schemas /app/schemas
 
diff --git a/preprocessors/sorting/Dockerfile b/preprocessors/sorting/Dockerfile
index 63d390da..5c892c37 100644
--- a/preprocessors/sorting/Dockerfile
+++ b/preprocessors/sorting/Dockerfile
@@ -4,10 +4,10 @@ RUN adduser --disabled-password python
 WORKDIR /app
 ENV PATH="/home/python/.local/bin:${PATH}"
 
-RUN pip install --upgrade pip
+RUN pip3 install --upgrade pip
 
 COPY /preprocessors/sorting/requirements.txt /app/requirements.txt
-RUN pip install -r requirements.txt
+RUN pip3 install -r requirements.txt
 
 COPY /schemas /app/schemas