diff --git a/docs/changelog.md b/docs/changelog.md
index d3e63c8ae..ddf1dd6b7 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -21,6 +21,9 @@ Requires libvips v8.15.2
 * Ensure `extend` operation stays sequential for multi-page TIFF (regression in 0.32.0).
   [#4069](https://github.com/lovell/sharp/issues/4069)
 
+* Tighten validation of constructor `text` integer properties.
+  [#4071](https://github.com/lovell/sharp/issues/4071)
+
 ### v0.33.3 - 23rd March 2024
 
 * Upgrade to libvips v8.15.2 for upstream bug fixes.
diff --git a/lib/input.js b/lib/input.js
index e212dc14e..612b03880 100644
--- a/lib/input.js
+++ b/lib/input.js
@@ -296,17 +296,17 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
           }
         }
         if (is.defined(inputOptions.text.width)) {
-          if (is.number(inputOptions.text.width)) {
+          if (is.integer(inputOptions.text.width) && inputOptions.text.width > 0) {
             inputDescriptor.textWidth = inputOptions.text.width;
           } else {
-            throw is.invalidParameterError('text.textWidth', 'number', inputOptions.text.width);
+            throw is.invalidParameterError('text.width', 'positive integer', inputOptions.text.width);
           }
         }
         if (is.defined(inputOptions.text.height)) {
-          if (is.number(inputOptions.text.height)) {
+          if (is.integer(inputOptions.text.height) && inputOptions.text.height > 0) {
             inputDescriptor.textHeight = inputOptions.text.height;
           } else {
-            throw is.invalidParameterError('text.height', 'number', inputOptions.text.height);
+            throw is.invalidParameterError('text.height', 'positive integer', inputOptions.text.height);
           }
         }
         if (is.defined(inputOptions.text.align)) {
@@ -324,10 +324,10 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
           }
         }
         if (is.defined(inputOptions.text.dpi)) {
-          if (is.number(inputOptions.text.dpi) && is.inRange(inputOptions.text.dpi, 1, 100000)) {
+          if (is.integer(inputOptions.text.dpi) && is.inRange(inputOptions.text.dpi, 1, 1000000)) {
             inputDescriptor.textDpi = inputOptions.text.dpi;
           } else {
-            throw is.invalidParameterError('text.dpi', 'number between 1 and 100000', inputOptions.text.dpi);
+            throw is.invalidParameterError('text.dpi', 'integer between 1 and 1000000', inputOptions.text.dpi);
           }
         }
         if (is.defined(inputOptions.text.rgba)) {
@@ -338,10 +338,10 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
           }
         }
         if (is.defined(inputOptions.text.spacing)) {
-          if (is.number(inputOptions.text.spacing)) {
+          if (is.integer(inputOptions.text.spacing) && is.inRange(inputOptions.text.spacing, -1000000, 1000000)) {
             inputDescriptor.textSpacing = inputOptions.text.spacing;
           } else {
-            throw is.invalidParameterError('text.spacing', 'number', inputOptions.text.spacing);
+            throw is.invalidParameterError('text.spacing', 'integer between -1000000 and 1000000', inputOptions.text.spacing);
           }
         }
         if (is.defined(inputOptions.text.wrap)) {
diff --git a/test/unit/text.js b/test/unit/text.js
index d404ac8bb..a81a88c93 100644
--- a/test/unit/text.js
+++ b/test/unit/text.js
@@ -228,26 +228,34 @@ describe('Text to image', function () {
     });
   });
 
-  it('bad width input', function () {
-    assert.throws(function () {
-      sharp({
-        text: {
-          text: 'text',
-          width: 'bad'
-        }
-      });
-    });
+  it('invalid width', () => {
+    assert.throws(
+      () => sharp({ text: { text: 'text', width: 'bad' } }),
+      /Expected positive integer for text\.width but received bad of type string/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', width: 0.1 } }),
+      /Expected positive integer for text\.width but received 0.1 of type number/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', width: -1 } }),
+      /Expected positive integer for text\.width but received -1 of type number/
+    );
   });
 
-  it('bad height input', function () {
-    assert.throws(function () {
-      sharp({
-        text: {
-          text: 'text',
-          height: 'bad'
-        }
-      });
-    });
+  it('invalid height', () => {
+    assert.throws(
+      () => sharp({ text: { text: 'text', height: 'bad' } }),
+      /Expected positive integer for text\.height but received bad of type string/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', height: 0.1 } }),
+      /Expected positive integer for text\.height but received 0.1 of type number/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', height: -1 } }),
+      /Expected positive integer for text\.height but received -1 of type number/
+    );
   });
 
   it('bad align input', function () {
@@ -272,15 +280,19 @@ describe('Text to image', function () {
     });
   });
 
-  it('bad dpi input', function () {
-    assert.throws(function () {
-      sharp({
-        text: {
-          text: 'text',
-          dpi: -10
-        }
-      });
-    });
+  it('invalid dpi', () => {
+    assert.throws(
+      () => sharp({ text: { text: 'text', dpi: 'bad' } }),
+      /Expected integer between 1 and 1000000 for text\.dpi but received bad of type string/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', dpi: 0.1 } }),
+      /Expected integer between 1 and 1000000 for text\.dpi but received 0.1 of type number/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', dpi: -1 } }),
+      /Expected integer between 1 and 1000000 for text\.dpi but received -1 of type number/
+    );
   });
 
   it('bad rgba input', function () {
@@ -294,15 +306,19 @@ describe('Text to image', function () {
     });
   });
 
-  it('bad spacing input', function () {
-    assert.throws(function () {
-      sharp({
-        text: {
-          text: 'text',
-          spacing: 'number expected'
-        }
-      });
-    });
+  it('invalid spacing', () => {
+    assert.throws(
+      () => sharp({ text: { text: 'text', spacing: 'bad' } }),
+      /Expected integer between -1000000 and 1000000 for text\.spacing but received bad of type string/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', spacing: 0.1 } }),
+      /Expected integer between -1000000 and 1000000 for text\.spacing but received 0.1 of type number/
+    );
+    assert.throws(
+      () => sharp({ text: { text: 'text', spacing: -1000001 } }),
+      /Expected integer between -1000000 and 1000000 for text\.spacing but received -1000001 of type number/
+    );
   });
 
   it('only height or dpi not both', function () {