diff --git a/.github/workflows/tiptapy.yml b/.github/workflows/tiptapy.yml
index 4245742..7e7be0d 100644
--- a/.github/workflows/tiptapy.yml
+++ b/.github/workflows/tiptapy.yml
@@ -12,29 +12,28 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ 3.7, 3.8, 3.9]
+        python-version: [3.8, 3.9]
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip jinja2
-    - name: Lint with flake8
-      run: |
-        pip install flake8
-        # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-    - name: Test with pytest
-      run: |
-        pip install pytest
-        pytest -xv
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip jinja2
+      - name: Lint with flake8
+        run: |
+          pip install flake8
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+      - name: Test with pytest
+        run: |
+          pip install pytest
+          pytest -xv
diff --git a/setup.cfg b/setup.cfg
index b26989b..d503428 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.20.0
+current_version = 0.21.0
 commit = True
 tag = True
 
diff --git a/setup.py b/setup.py
index c0c4696..6c09426 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="tiptapy",
-    version="0.20.0",
+    version="0.21.0",
     url="https://github.com/scrolltech/tiptapy",
     description="Library that generates HTML output from JSON export of tiptap editor",
     long_description=open("README.md").read(),
diff --git a/tests/data/html/image-src_string.html b/tests/data/html/image-src_string.html
new file mode 100644
index 0000000..8c7d3a1
--- /dev/null
+++ b/tests/data/html/image-src_string.html
@@ -0,0 +1 @@
+<figure><picture><source srcset="https://placekitten.com/200/301" type="image"/><source srcset="https://placekitten.com/200/301" type="image"/><img src="https://placekitten.com/200/301" alt="Sleepy Kitten" width="300" height="400"/></picture><figcaption>Cute Kitty</figcaption></figure>
\ No newline at end of file
diff --git a/tests/data/json/image-src_string.json b/tests/data/json/image-src_string.json
new file mode 100644
index 0000000..2f8f564
--- /dev/null
+++ b/tests/data/json/image-src_string.json
@@ -0,0 +1,15 @@
+{
+  "type": "doc",
+  "content": [
+    {
+      "type": "image",
+      "attrs": {
+        "src": "https://placekitten.com/200/301",
+        "alt": "Sleepy Kitten",
+        "caption": "Cute Kitty",
+        "height": 400,
+        "width": 300
+      }
+    }
+  ]
+}
diff --git a/tests/test_transform.py b/tests/test_transform.py
index 1decf32..19f3cca 100644
--- a/tests/test_transform.py
+++ b/tests/test_transform.py
@@ -21,6 +21,7 @@
     "image-no_caption",
     "image-mime_type",
     "image-height_width",
+    "image-src_string",
     "featuredimage",
     "featuredimage-is_renderable",
     "featuredimage-missing_caption",
diff --git a/tiptapy/__init__.py b/tiptapy/__init__.py
index e10dfb0..5a41ec4 100644
--- a/tiptapy/__init__.py
+++ b/tiptapy/__init__.py
@@ -15,7 +15,7 @@
     extract_tag_attrs,
 )
 
-__version__ = "0.20.0"
+__version__ = "0.21.0"
 
 renderers: Dict = {}
 
diff --git a/tiptapy/macros.py b/tiptapy/macros.py
index 124afe6..0577fa9 100644
--- a/tiptapy/macros.py
+++ b/tiptapy/macros.py
@@ -20,7 +20,11 @@ def make_img_src(attrs):
     alt = attrs.get("alt", "").strip()
     height = attrs.get("height", "")
     width = attrs.get("width", "")
-    fallback_url = attrs["src"]["fallback"].strip()
+    if isinstance(attrs["src"], dict):
+        fallback_url = attrs["src"]["fallback"].strip()
+    else:
+        fallback_url = attrs["src"].strip()
+
     img = f'img src="{fallback_url}"'
     if alt:
         img += f' alt="{alt}"'
diff --git a/tiptapy/templates/image.html b/tiptapy/templates/image.html
index 1e210b0..6b6d3c9 100644
--- a/tiptapy/templates/image.html
+++ b/tiptapy/templates/image.html
@@ -3,9 +3,9 @@
   {%- set alt = node.attrs.alt|trim -%}
   {%- set height = node.attrs.height -%}
   {%- set width = node.attrs.width -%}
-  {%- set image_url = node.attrs.src.image|trim -%}
+  {%- set image_url = (node.attrs.src.image if node.attrs.src is mapping else node.attrs.src)|trim -%}
   {%- set image_type = url2mime(image_url) -%}
-  {%- set fallback_url = node.attrs.src.fallback|trim -%}
+  {%- set fallback_url = (node.attrs.src.fallback if node.attrs.src is mapping else node.attrs.src)|trim -%}
   {%- set fallback_type = url2mime(fallback_url) -%}
 
   {%- if image_url or fallback_url -%}