diff --git a/src/csl/taxonomy.rs b/src/csl/taxonomy.rs
index 778e152..de98feb 100644
--- a/src/csl/taxonomy.rs
+++ b/src/csl/taxonomy.rs
@@ -810,8 +810,15 @@ impl EntryLike for citationberg::json::Item {
     ) -> Option<MaybeTyped<PageRanges>> {
         match variable {
             PageVariable::Page => match self.0.get("page")? {
-                csl_json::Value::Number(n) => {
-                    Some(MaybeTyped::Typed(PageRanges::from(*n as u64)))
+                &csl_json::Value::Number(n) => {
+                    // Page ranges use i32 internally, so we check whether the
+                    // number is in range.
+                    Some(match i32::try_from(n) {
+                        Ok(n) => MaybeTyped::Typed(PageRanges::from(n)),
+                        // If the number is not in range, we degrade to a
+                        // string, which disables some CSL features.
+                        Err(_) => MaybeTyped::String(n.to_string()),
+                    })
                 }
                 csl_json::Value::String(s) => {
                     let res = MaybeTyped::<PageRanges>::infallible_from_str(s);
diff --git a/src/types/mod.rs b/src/types/mod.rs
index 5fbd5b5..437ced6 100644
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -46,7 +46,41 @@ macro_rules! deserialize_from_str {
                 D: serde::Deserializer<'de>,
             {
                 let s = <&'de str>::deserialize(deserializer)?;
-                FromStr::from_str(s).map_err(de::Error::custom)
+                FromStr::from_str(s).map_err(serde::de::Error::custom)
+            }
+        }
+    };
+}
+
+macro_rules! custom_deserialize {
+    ($type_name:ident where $expect:literal $($additional_visitors:item)+) => {
+        impl<'de> Deserialize<'de> for $type_name {
+            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+            where
+            D: serde::Deserializer<'de>,
+            {
+                use std::fmt;
+                use serde::de::{Visitor};
+                struct OurVisitor;
+
+                impl<'de> Visitor<'de> for OurVisitor {
+                    type Value = $type_name;
+
+                    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                        formatter.write_str($expect)
+                    }
+
+                    fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
+                    where
+                        E: serde::de::Error,
+                    {
+                        Self::Value::from_str(value).map_err(|e| E::custom(e.to_string()))
+                    }
+
+                    $($additional_visitors)*
+                }
+
+                deserializer.deserialize_any(OurVisitor)
             }
         }
     };
@@ -75,53 +109,29 @@ macro_rules! derive_or_from_str {
         }
 
 
-        impl<'de> Deserialize<'de> for $s {
-            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-            where
-            D: serde::Deserializer<'de>,
-            {
-                use std::fmt;
-                use serde::de::{self, Visitor};
-                struct OurVisitor;
-
-                impl<'de> Visitor<'de> for OurVisitor {
-                    type Value = $s;
-
-                    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-                        formatter.write_str($expect)
-                    }
-
-                    fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
-                    where
-                        E: serde::de::Error,
-                    {
-                        Self::Value::from_str(value).map_err(|e| E::custom(e.to_string()))
-                    }
+        crate::types::custom_deserialize!(
+            $s where $expect
+            fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>
+                where A: serde::de::MapAccess<'de>, {
+                use serde::{de, Deserialize};
 
-                    fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>
-                    where
-                        A: serde::de::MapAccess<'de>,
-                    {
-                        #[derive(Deserialize)]
-                        #[serde(rename_all = "kebab-case")]
-                        struct Inner {
-                            $(
-                                $(#[serde $serde])*
-                                $i: $t,
-                            )*
-                        }
-
-                        Deserialize::deserialize(de::value::MapAccessDeserializer::new(map))
-                            .map(|inner: Inner| $s { $($i: inner.$i),* })
-                    }
+                #[derive(Deserialize)]
+                #[serde(rename_all = "kebab-case")]
+                struct Inner {
+                    $(
+                        $(#[serde $serde])*
+                        $i: $t,
+                    )*
                 }
 
-                deserializer.deserialize_any(OurVisitor)
+                Deserialize::deserialize(de::value::MapAccessDeserializer::new(map))
+                    .map(|inner: Inner| $s { $($i: inner.$i),* })
             }
-        }
+        );
     };
 }
 
+use custom_deserialize;
 use derive_or_from_str;
 use deserialize_from_str;
 use serialize_display;
@@ -595,4 +605,27 @@ mod tests {
         assert!(Numeric::from_str("second").is_err());
         assert!(Numeric::from_str("2nd edition").is_err());
     }
+
+    #[test]
+    #[cfg(feature = "biblatex")]
+    fn test_issue_227() {
+        let yaml = r#"
+AAAnonymous_AventureMortevielle_1987:
+  type: Book
+  page-range: 100"#;
+
+        let library = crate::io::from_yaml_str(yaml).unwrap();
+        let entry = library.get("AAAnonymous_AventureMortevielle_1987").unwrap();
+        assert_eq!(
+            entry
+                .page_range
+                .as_ref()
+                .unwrap()
+                .as_typed()
+                .unwrap()
+                .first()
+                .unwrap(),
+            &Numeric::new(100)
+        );
+    }
 }
diff --git a/src/types/numeric.rs b/src/types/numeric.rs
index 9716cf3..b242d5f 100644
--- a/src/types/numeric.rs
+++ b/src/types/numeric.rs
@@ -46,7 +46,9 @@ impl<'de> Deserialize<'de> for Numeric {
 
             /// A default serde fallthrough handler for signed integers.
             fn visit_i64<E: Error>(self, v: i64) -> Result<Self::Value, E> {
-                Ok(Numeric::new(v.try_into().map_err(|_| E::custom("value too large"))?))
+                Ok(Numeric::new(
+                    v.try_into().map_err(|_| E::custom("value out of bounds"))?,
+                ))
             }
 
             fn visit_i32<E: Error>(self, v: i32) -> Result<Self::Value, E> {
diff --git a/src/types/page.rs b/src/types/page.rs
index ecf231e..af792eb 100644
--- a/src/types/page.rs
+++ b/src/types/page.rs
@@ -1,9 +1,14 @@
-use std::{cmp::Ordering, fmt::Display, num::NonZeroUsize, str::FromStr};
+use std::{
+    cmp::Ordering,
+    fmt::Display,
+    num::{NonZeroUsize, TryFromIntError},
+    str::FromStr,
+};
 
 use crate::{MaybeTyped, Numeric, NumericError};
 
-use super::{deserialize_from_str, serialize_display};
-use serde::{de, Deserialize, Serialize};
+use super::{custom_deserialize, serialize_display};
+use serde::{Deserialize, Serialize};
 use thiserror::Error;
 
 impl MaybeTyped<PageRanges> {
@@ -23,6 +28,22 @@ pub struct PageRanges {
     pub ranges: Vec<PageRangesPart>,
 }
 
+custom_deserialize!(
+    PageRanges where "pages, page ranges, ampersands, and commas"
+    fn visit_i32<E: serde::de::Error>(self, v: i32) -> Result<Self::Value, E> {
+        Ok(PageRanges::from(v))
+    }
+    fn visit_u32<E: serde::de::Error>(self, v: u32) -> Result<Self::Value, E> {
+        PageRanges::try_from(v).map_err(|_| E::custom("value too large"))
+    }
+    fn visit_i64<E: serde::de::Error>(self, v: i64) -> Result<Self::Value, E> {
+        PageRanges::try_from(v).map_err(|_| E::custom("value out of bounds"))
+    }
+    fn visit_u64<E: serde::de::Error>(self, v: u64) -> Result<Self::Value, E> {
+        PageRanges::try_from(v).map_err(|_| E::custom("value too large"))
+    }
+);
+
 impl PageRanges {
     /// Create a new `PageRanges` struct.
     pub fn new(ranges: Vec<PageRangesPart>) -> Self {
@@ -76,12 +97,36 @@ impl PageRanges {
     }
 }
 
-impl From<u64> for PageRanges {
-    fn from(value: u64) -> Self {
+impl From<i32> for PageRanges {
+    fn from(value: i32) -> Self {
         Self { ranges: vec![value.into()] }
     }
 }
 
+impl TryFrom<u32> for PageRanges {
+    type Error = TryFromIntError;
+
+    fn try_from(value: u32) -> Result<Self, Self::Error> {
+        Ok(Self { ranges: vec![value.try_into()?] })
+    }
+}
+
+impl TryFrom<i64> for PageRanges {
+    type Error = TryFromIntError;
+
+    fn try_from(value: i64) -> Result<Self, Self::Error> {
+        Ok(Self { ranges: vec![value.try_into()?] })
+    }
+}
+
+impl TryFrom<u64> for PageRanges {
+    type Error = TryFromIntError;
+
+    fn try_from(value: u64) -> Result<Self, Self::Error> {
+        Ok(Self { ranges: vec![value.try_into()?] })
+    }
+}
+
 impl Display for PageRanges {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         self.ranges.iter().try_for_each(|r| r.fmt(f))
@@ -116,6 +161,22 @@ pub enum PageRangesPart {
     Range(Numeric, Numeric),
 }
 
+custom_deserialize!(
+    PageRangesPart where "a page, a page range, or a separator"
+    fn visit_i32<E: serde::de::Error>(self, v: i32) -> Result<Self::Value, E> {
+        Ok(PageRangesPart::from(v))
+    }
+    fn visit_u32<E: serde::de::Error>(self, v: u32) -> Result<Self::Value, E> {
+        PageRangesPart::try_from(v).map_err(|_| E::custom("value too large"))
+    }
+    fn visit_i64<E: serde::de::Error>(self, v: i64) -> Result<Self::Value, E> {
+        PageRangesPart::try_from(v).map_err(|_| E::custom("value out of bounds"))
+    }
+    fn visit_u64<E: serde::de::Error>(self, v: u64) -> Result<Self::Value, E> {
+        PageRangesPart::try_from(v).map_err(|_| E::custom("value too large"))
+    }
+);
+
 impl PageRangesPart {
     /// The start of a range, if any.
     pub fn start(&self) -> Option<&Numeric> {
@@ -169,9 +230,36 @@ impl PageRangesPart {
     }
 }
 
-impl From<u64> for PageRangesPart {
-    fn from(value: u64) -> Self {
-        Self::SinglePage((value as u32).into())
+impl From<i32> for PageRangesPart {
+    fn from(value: i32) -> Self {
+        Self::SinglePage(value.into())
+    }
+}
+
+impl TryFrom<u32> for PageRangesPart {
+    type Error = TryFromIntError;
+
+    fn try_from(value: u32) -> Result<Self, Self::Error> {
+        let value: i32 = value.try_into()?;
+        Ok(Self::SinglePage(value.into()))
+    }
+}
+
+impl TryFrom<i64> for PageRangesPart {
+    type Error = TryFromIntError;
+
+    fn try_from(value: i64) -> Result<Self, Self::Error> {
+        let value: i32 = value.try_into()?;
+        Ok(Self::SinglePage(value.into()))
+    }
+}
+
+impl TryFrom<u64> for PageRangesPart {
+    type Error = TryFromIntError;
+
+    fn try_from(value: u64) -> Result<Self, Self::Error> {
+        let value: i32 = value.try_into()?;
+        Ok(Self::SinglePage(value.into()))
     }
 }
 
@@ -246,7 +334,6 @@ impl FromStr for PageRangesPart {
     }
 }
 
-deserialize_from_str!(PageRanges);
 serialize_display!(PageRanges);
 
 fn parse_number(s: &str) -> Result<Numeric, NumericError> {